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-<HEAD>
-<TITLE>Node, Edge and Graph Attributes</TITLE>
-</HEAD>
-<BODY BGCOLOR=white>
-<H1 align=CENTER ID="top">Node, Edge and Graph Attributes</H1>
-<HR>
-The table below describes the attributes used by various Graphviz tools.
-The table gives the name of the attribute, the graph components (node,
-edge, etc.) which use the attribute and the type of the attribute
-(strings representing legal values of that type). Where applicable, the table
-also gives a default value for the attribute, a minimum allowed setting
-for numeric attributes, and certain restrictions on the use of the attribute.
-<P>
-Note that attribute names are case-sensitive.
-This is usually true for attribute values as well, unless noted.
-<P>
-All Graphviz attributes are specified by name-value pairs. Thus, to
-set the fillcolor of a node <CODE>abc</CODE>, one would use
-<TABLE>
-<TR><TD><CODE>abc [fillcolor = red]</CODE></TR>
-</TABLE>
-Similarly, to set the arrowhead style of an edge <CODE>abc -> def</CODE>,
-one would use
-<TABLE>
-<TR><TD><CODE>abc -> def [arrowhead = diamond]</CODE></TR>
-</TABLE>
-Further details concerning the setting of attributes can be found
-in the description of the
-<A HREF="lang.html">DOT language.</A>
-<P>
-At present, most device-independent units are either inches or
-<A ID="points" HREF="http://en.wikipedia.org/wiki/Point_(typography)">points</A>,
-which we take as 72 points per inch.
-<P ID="h:undir_note">
-<STRONG>Note:</STRONG> Some attributes, such as
-<A HREF="#d:dir">dir</A> or <A HREF="#d:arrowtail">arrowtail</A>, are
-ambiguous when used in
-<A HREF="lang.html">DOT</A>
-with an undirected graph since the head and tail of an edge are meaningless.
-As a convention, the first time an undirected edge appears, the
-<A HREF="lang.html">DOT</A>
-parser will assign the left node as the tail node and the right node as
-the head. For example, the edge <CODE>A -- B</CODE> will have tail <CODE>A</CODE>
-and head <CODE>B</CODE>. It is the user's responsibility to handle such
-edges consistently. If the edge appears later, in the format
-<TABLE>
-<TR><TD><CODE>B -- A [taillabel = "tail"]</CODE></TR>
-</TABLE>
-the drawing will attach the tail label to node <CODE>A</CODE>.
-To avoid possible confusion when such attributes are required, the user
-is encouraged to use a directed graph.
-If it is important to make the graph appear undirected, this can be
-done using the <A HREF="#d:dir">dir</A>, <A HREF="#d:arrowtail">arrowtail</A>
-or <A HREF="#d:arrowhead">arrowhead</A> attributes.
-<P ID="k:bool">
-The tools accept standard C representations for <EM>int</EM> and
-<EM>double</EM> types.
-For the <EM>bool</EM> type, TRUE values are
-represented by "true" or "yes" (case-insensitive)
-and any non-zero integer, and FALSE values by "false" or "no" (case-insensitive)
-and zero.
-In addition, there are a variety of specialized types such as
-<EM>arrowType</EM>, <EM>color</EM>,
-<EM>point</EM> and <EM>rankdir</EM>. Legal values for these types are given
-at the end.
-<P ID="h:uses">
-In the <STRONG>Used By</STRONG> field, the
-characters E, N, G, S and C
-represent edges, nodes, the root graph, subgraphs
-and cluster subgraphs, respectively.
-This field indicates which graph component uses the attribute.
-<P>
-In the <STRONG>Notes</STRONG> field, an annotation of <em>write only</em>
-indicates that the attribute is used for output, and is not used or read by any
-of the layout programs.
-<HR ALIGN=CENTER WIDTH="70%" SIZE=3>
-
-<TABLE ALIGN=CENTER>
-<TR>
- <TH>Name</TH>
- <TH><A HREF="#h:uses">Used By</A></TH>
- <TH>Type</TH>
- <TH ALIGN=CENTER>Default</TH>
- <TH>Minimum</TH>
- <TH>Notes</TH>
-</TR>
-<TR>
- <TD><A ID="a:Damping" HREF="#d:Damping">Damping</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.99</TD>
- <TD>0.0</TD>
- <TD>neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:K" HREF="#d:K">K</A></TD>
- <TD>GC</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.3</TD>
- <TD>0</TD>
- <TD>sfdp, fdp only</TD>
-</TR>
-<TR>
- <TD><A ID="a:URL" HREF="#d:URL">URL</A></TD>
- <TD>ENGC</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER"><none></TD>
- <TD></TD>
- <TD>svg, postscript, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:_background" HREF="#d:_background">_background</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER"><none></TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:area" HREF="#d:area">area</A></TD>
- <TD>NC</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1.0</TD>
- <TD>>0</TD>
- <TD>patchwork only</TD>
-</TR>
-<TR>
- <TD><A ID="a:arrowhead" HREF="#d:arrowhead">arrowhead</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:arrowType">arrowType</A></TD>
- <TD ALIGN="CENTER">normal</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:arrowsize" HREF="#d:arrowsize">arrowsize</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1.0</TD>
- <TD>0.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:arrowtail" HREF="#d:arrowtail">arrowtail</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:arrowType">arrowType</A></TD>
- <TD ALIGN="CENTER">normal</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:bb" HREF="#d:bb">bb</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:rect">rect</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>write only</TD>
-</TR>
-<TR>
- <TD><A ID="a:bgcolor" HREF="#d:bgcolor">bgcolor</A></TD>
- <TD>GC</TD>
- <TD><A HREF="#k:color">color</A><BR><A HREF="#k:colorList">colorList</A></TD>
- <TD ALIGN="CENTER"><none></TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:center" HREF="#d:center">center</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:charset" HREF="#d:charset">charset</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">"UTF-8"</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:class" HREF="#d:class">class</A></TD>
- <TD>ENCG</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg only</TD>
-</TR>
-<TR>
- <TD><A ID="a:clusterrank" HREF="#d:clusterrank">clusterrank</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:clusterMode">clusterMode</A></TD>
- <TD ALIGN="CENTER">local</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:color" HREF="#d:color">color</A></TD>
- <TD>ENC</TD>
- <TD><A HREF="#k:color">color</A><BR><A HREF="#k:colorList">colorList</A></TD>
- <TD ALIGN="CENTER">black</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:colorscheme" HREF="#d:colorscheme">colorscheme</A></TD>
- <TD>ENCG</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:comment" HREF="#d:comment">comment</A></TD>
- <TD>ENG</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:compound" HREF="#d:compound">compound</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:concentrate" HREF="#d:concentrate">concentrate</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:constraint" HREF="#d:constraint">constraint</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">true</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:decorate" HREF="#d:decorate">decorate</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:defaultdist" HREF="#d:defaultdist">defaultdist</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1+(avg. len)*sqrt(|V|)</TD>
- <TD>epsilon</TD>
- <TD>neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:dim" HREF="#d:dim">dim</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">2</TD>
- <TD>2</TD>
- <TD>sfdp, fdp, neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:dimen" HREF="#d:dimen">dimen</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">2</TD>
- <TD>2</TD>
- <TD>sfdp, fdp, neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:dir" HREF="#d:dir">dir</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:dirType">dirType</A></TD>
- <TD ALIGN="CENTER">forward(directed)<BR>none(undirected)</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:diredgeconstraints" HREF="#d:diredgeconstraints">diredgeconstraints</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A><BR><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD>neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:distortion" HREF="#d:distortion">distortion</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.0</TD>
- <TD>-100.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:dpi" HREF="#d:dpi">dpi</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">96.0<BR>0.0</TD>
- <TD></TD>
- <TD>svg, bitmap output only</TD>
-</TR>
-<TR>
- <TD><A ID="a:edgeURL" HREF="#d:edgeURL">edgeURL</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:edgehref" HREF="#d:edgehref">edgehref</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:edgetarget" HREF="#d:edgetarget">edgetarget</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER"><none></TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:edgetooltip" HREF="#d:edgetooltip">edgetooltip</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, cmap only</TD>
-</TR>
-<TR>
- <TD><A ID="a:epsilon" HREF="#d:epsilon">epsilon</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">.0001 * # nodes(mode == KK)<BR>.0001(mode == major)<BR>.01(mode == sgd)</TD>
- <TD></TD>
- <TD>neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:esep" HREF="#d:esep">esep</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:addDouble">addDouble</A><BR><A HREF="#k:addPoint">addPoint</A></TD>
- <TD ALIGN="CENTER">+3</TD>
- <TD></TD>
- <TD>not dot</TD>
-</TR>
-<TR>
- <TD><A ID="a:fillcolor" HREF="#d:fillcolor">fillcolor</A></TD>
- <TD>NEC</TD>
- <TD><A HREF="#k:color">color</A><BR><A HREF="#k:colorList">colorList</A></TD>
- <TD ALIGN="CENTER">lightgrey(nodes)<BR>black(clusters)</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:fixedsize" HREF="#d:fixedsize">fixedsize</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:bool">bool</A><BR><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:fontcolor" HREF="#d:fontcolor">fontcolor</A></TD>
- <TD>ENGC</TD>
- <TD><A HREF="#k:color">color</A></TD>
- <TD ALIGN="CENTER">black</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:fontname" HREF="#d:fontname">fontname</A></TD>
- <TD>ENGC</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">"Times-Roman"</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:fontnames" HREF="#d:fontnames">fontnames</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg only</TD>
-</TR>
-<TR>
- <TD><A ID="a:fontpath" HREF="#d:fontpath">fontpath</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">system-dependent</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:fontsize" HREF="#d:fontsize">fontsize</A></TD>
- <TD>ENGC</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">14.0</TD>
- <TD>1.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:forcelabels" HREF="#d:forcelabels">forcelabels</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">true</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:gradientangle" HREF="#d:gradientangle">gradientangle</A></TD>
- <TD>NCG</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:group" HREF="#d:group">group</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:headURL" HREF="#d:headURL">headURL</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:head_lp" HREF="#d:head_lp">head_lp</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:point">point</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>write only</TD>
-</TR>
-<TR>
- <TD><A ID="a:headclip" HREF="#d:headclip">headclip</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">true</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:headhref" HREF="#d:headhref">headhref</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:headlabel" HREF="#d:headlabel">headlabel</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:lblString">lblString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:headport" HREF="#d:headport">headport</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:portPos">portPos</A></TD>
- <TD ALIGN="CENTER">center</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:headtarget" HREF="#d:headtarget">headtarget</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER"><none></TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:headtooltip" HREF="#d:headtooltip">headtooltip</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, cmap only</TD>
-</TR>
-<TR>
- <TD><A ID="a:height" HREF="#d:height">height</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.5</TD>
- <TD>0.02</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:href" HREF="#d:href">href</A></TD>
- <TD>GCNE</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, postscript, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:id" HREF="#d:id">id</A></TD>
- <TD>GCNE</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, postscript, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:image" HREF="#d:image">image</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:imagepath" HREF="#d:imagepath">imagepath</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:imagepos" HREF="#d:imagepos">imagepos</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">"mc"</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:imagescale" HREF="#d:imagescale">imagescale</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:bool">bool</A><BR><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:inputscale" HREF="#d:inputscale">inputscale</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER"><none></TD>
- <TD></TD>
- <TD>fdp, neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:label" HREF="#d:label">label</A></TD>
- <TD>ENGC</TD>
- <TD><A HREF="#k:lblString">lblString</A></TD>
- <TD ALIGN="CENTER">"\&#92;N" (nodes)<BR>"" (otherwise)</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:labelURL" HREF="#d:labelURL">labelURL</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:label_scheme" HREF="#d:label_scheme">label_scheme</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">0</TD>
- <TD>0</TD>
- <TD>sfdp only</TD>
-</TR>
-<TR>
- <TD><A ID="a:labelangle" HREF="#d:labelangle">labelangle</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">-25.0</TD>
- <TD>-180.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:labeldistance" HREF="#d:labeldistance">labeldistance</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1.0</TD>
- <TD>0.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:labelfloat" HREF="#d:labelfloat">labelfloat</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:labelfontcolor" HREF="#d:labelfontcolor">labelfontcolor</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:color">color</A></TD>
- <TD ALIGN="CENTER">black</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:labelfontname" HREF="#d:labelfontname">labelfontname</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">"Times-Roman"</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:labelfontsize" HREF="#d:labelfontsize">labelfontsize</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">14.0</TD>
- <TD>1.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:labelhref" HREF="#d:labelhref">labelhref</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:labeljust" HREF="#d:labeljust">labeljust</A></TD>
- <TD>GC</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">"c"</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:labelloc" HREF="#d:labelloc">labelloc</A></TD>
- <TD>NGC</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">"t"(clusters)<BR>"b"(root graphs)<BR>"c"(nodes)</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:labeltarget" HREF="#d:labeltarget">labeltarget</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER"><none></TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:labeltooltip" HREF="#d:labeltooltip">labeltooltip</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, cmap only</TD>
-</TR>
-<TR>
- <TD><A ID="a:landscape" HREF="#d:landscape">landscape</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:layer" HREF="#d:layer">layer</A></TD>
- <TD>ENC</TD>
- <TD><A HREF="#k:layerRange">layerRange</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:layerlistsep" HREF="#d:layerlistsep">layerlistsep</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">","</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:layers" HREF="#d:layers">layers</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:layerList">layerList</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:layerselect" HREF="#d:layerselect">layerselect</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:layerRange">layerRange</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:layersep" HREF="#d:layersep">layersep</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">" </TD>
- <TD>&#92;t"</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:layout" HREF="#d:layout">layout</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:len" HREF="#d:len">len</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1.0(neato)<BR>0.3(fdp)</TD>
- <TD></TD>
- <TD>fdp, neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:levels" HREF="#d:levels">levels</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">MAXINT</TD>
- <TD>0.0</TD>
- <TD>sfdp only</TD>
-</TR>
-<TR>
- <TD><A ID="a:levelsgap" HREF="#d:levelsgap">levelsgap</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.0</TD>
- <TD></TD>
- <TD>neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:lhead" HREF="#d:lhead">lhead</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:lheight" HREF="#d:lheight">lheight</A></TD>
- <TD>GC</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>write only</TD>
-</TR>
-<TR>
- <TD><A ID="a:lp" HREF="#d:lp">lp</A></TD>
- <TD>EGC</TD>
- <TD><A HREF="#k:point">point</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>write only</TD>
-</TR>
-<TR>
- <TD><A ID="a:ltail" HREF="#d:ltail">ltail</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:lwidth" HREF="#d:lwidth">lwidth</A></TD>
- <TD>GC</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>write only</TD>
-</TR>
-<TR>
- <TD><A ID="a:margin" HREF="#d:margin">margin</A></TD>
- <TD>NCG</TD>
- <TD><A HREF="#k:double">double</A><BR><A HREF="#k:point">point</A></TD>
- <TD ALIGN="CENTER"><device-dependent></TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:maxiter" HREF="#d:maxiter">maxiter</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">100 * # nodes(mode == KK)<BR>200(mode == major)<BR>30(mode == sgd)<BR>600(fdp)</TD>
- <TD></TD>
- <TD>fdp, neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:mclimit" HREF="#d:mclimit">mclimit</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1.0</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:mindist" HREF="#d:mindist">mindist</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1.0</TD>
- <TD>0.0</TD>
- <TD>circo only</TD>
-</TR>
-<TR>
- <TD><A ID="a:minlen" HREF="#d:minlen">minlen</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">1</TD>
- <TD>0</TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:mode" HREF="#d:mode">mode</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">major</TD>
- <TD></TD>
- <TD>neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:model" HREF="#d:model">model</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">shortpath</TD>
- <TD></TD>
- <TD>neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:mosek" HREF="#d:mosek">mosek</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD>neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:newrank" HREF="#d:newrank">newrank</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:nodesep" HREF="#d:nodesep">nodesep</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.25</TD>
- <TD>0.02</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:nojustify" HREF="#d:nojustify">nojustify</A></TD>
- <TD>GCNE</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:normalize" HREF="#d:normalize">normalize</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A><BR><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD>not dot</TD>
-</TR>
-<TR>
- <TD><A ID="a:notranslate" HREF="#d:notranslate">notranslate</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD>neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:nslimit" HREF="#d:nslimit">nslimit</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:nslimit1" HREF="#d:nslimit1">nslimit1</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:ordering" HREF="#d:ordering">ordering</A></TD>
- <TD>GN</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:orientation" HREF="#d:orientation">orientation</A></TD>
- <TD>NG</TD>
- <TD><A HREF="#k:double">double</A><BR><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">0.0<BR>""</TD>
- <TD>360.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:outputorder" HREF="#d:outputorder">outputorder</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:outputMode">outputMode</A></TD>
- <TD ALIGN="CENTER">breadthfirst</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:overlap" HREF="#d:overlap">overlap</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A><BR><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">true</TD>
- <TD></TD>
- <TD>not dot</TD>
-</TR>
-<TR>
- <TD><A ID="a:overlap_scaling" HREF="#d:overlap_scaling">overlap_scaling</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">-4</TD>
- <TD>-1.0e10</TD>
- <TD>prism only</TD>
-</TR>
-<TR>
- <TD><A ID="a:overlap_shrink" HREF="#d:overlap_shrink">overlap_shrink</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">true</TD>
- <TD></TD>
- <TD>prism only</TD>
-</TR>
-<TR>
- <TD><A ID="a:pack" HREF="#d:pack">pack</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A><BR><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:packmode" HREF="#d:packmode">packmode</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:packMode">packMode</A></TD>
- <TD ALIGN="CENTER">node</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:pad" HREF="#d:pad">pad</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A><BR><A HREF="#k:point">point</A></TD>
- <TD ALIGN="CENTER">0.0555 (4 points)</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:page" HREF="#d:page">page</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A><BR><A HREF="#k:point">point</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:pagedir" HREF="#d:pagedir">pagedir</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:pagedir">pagedir</A></TD>
- <TD ALIGN="CENTER">BL</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:pencolor" HREF="#d:pencolor">pencolor</A></TD>
- <TD>C</TD>
- <TD><A HREF="#k:color">color</A></TD>
- <TD ALIGN="CENTER">black</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:penwidth" HREF="#d:penwidth">penwidth</A></TD>
- <TD>CNE</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1.0</TD>
- <TD>0.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:peripheries" HREF="#d:peripheries">peripheries</A></TD>
- <TD>NC</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">shape default(nodes)<BR>1(clusters)</TD>
- <TD>0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:pin" HREF="#d:pin">pin</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD>fdp, neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:pos" HREF="#d:pos">pos</A></TD>
- <TD>EN</TD>
- <TD><A HREF="#k:point">point</A><BR><A HREF="#k:splineType">splineType</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:quadtree" HREF="#d:quadtree">quadtree</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:quadType">quadType</A><BR><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">normal</TD>
- <TD></TD>
- <TD>sfdp only</TD>
-</TR>
-<TR>
- <TD><A ID="a:quantum" HREF="#d:quantum">quantum</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.0</TD>
- <TD>0.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:rank" HREF="#d:rank">rank</A></TD>
- <TD>S</TD>
- <TD><A HREF="#k:rankType">rankType</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:rankdir" HREF="#d:rankdir">rankdir</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:rankdir">rankdir</A></TD>
- <TD ALIGN="CENTER">TB</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:ranksep" HREF="#d:ranksep">ranksep</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A><BR><A HREF="#k:doubleList">doubleList</A></TD>
- <TD ALIGN="CENTER">0.5(dot)<BR>1.0(twopi)</TD>
- <TD>0.02</TD>
- <TD>twopi, dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:ratio" HREF="#d:ratio">ratio</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A><BR><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:rects" HREF="#d:rects">rects</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:rect">rect</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>write only</TD>
-</TR>
-<TR>
- <TD><A ID="a:regular" HREF="#d:regular">regular</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">false</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:remincross" HREF="#d:remincross">remincross</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">true</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:repulsiveforce" HREF="#d:repulsiveforce">repulsiveforce</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1.0</TD>
- <TD>0.0</TD>
- <TD>sfdp only</TD>
-</TR>
-<TR>
- <TD><A ID="a:resolution" HREF="#d:resolution">resolution</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">96.0<BR>0.0</TD>
- <TD></TD>
- <TD>svg, bitmap output only</TD>
-</TR>
-<TR>
- <TD><A ID="a:root" HREF="#d:root">root</A></TD>
- <TD>GN</TD>
- <TD><A HREF="#k:string">string</A><BR><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER"><none>(graphs)<BR>false(nodes)</TD>
- <TD></TD>
- <TD>circo, twopi only</TD>
-</TR>
-<TR>
- <TD><A ID="a:rotate" HREF="#d:rotate">rotate</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">0</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:rotation" HREF="#d:rotation">rotation</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0</TD>
- <TD></TD>
- <TD>sfdp only</TD>
-</TR>
-<TR>
- <TD><A ID="a:samehead" HREF="#d:samehead">samehead</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:sametail" HREF="#d:sametail">sametail</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:samplepoints" HREF="#d:samplepoints">samplepoints</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">8(output)<BR>20(overlap and image maps)</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:scale" HREF="#d:scale">scale</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A><BR><A HREF="#k:point">point</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>not dot</TD>
-</TR>
-<TR>
- <TD><A ID="a:searchsize" HREF="#d:searchsize">searchsize</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">30</TD>
- <TD></TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:sep" HREF="#d:sep">sep</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:addDouble">addDouble</A><BR><A HREF="#k:addPoint">addPoint</A></TD>
- <TD ALIGN="CENTER">+4</TD>
- <TD></TD>
- <TD>not dot</TD>
-</TR>
-<TR>
- <TD><A ID="a:shape" HREF="#d:shape">shape</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:shape">shape</A></TD>
- <TD ALIGN="CENTER">ellipse</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:shapefile" HREF="#d:shapefile">shapefile</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:showboxes" HREF="#d:showboxes">showboxes</A></TD>
- <TD>ENG</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">0</TD>
- <TD>0</TD>
- <TD>dot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:sides" HREF="#d:sides">sides</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">4</TD>
- <TD>0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:size" HREF="#d:size">size</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A><BR><A HREF="#k:point">point</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:skew" HREF="#d:skew">skew</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.0</TD>
- <TD>-100.0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:smoothing" HREF="#d:smoothing">smoothing</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:smoothType">smoothType</A></TD>
- <TD ALIGN="CENTER">"none"</TD>
- <TD></TD>
- <TD>sfdp only</TD>
-</TR>
-<TR>
- <TD><A ID="a:sortv" HREF="#d:sortv">sortv</A></TD>
- <TD>GCN</TD>
- <TD><A HREF="#k:int">int</A></TD>
- <TD ALIGN="CENTER">0</TD>
- <TD>0</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:splines" HREF="#d:splines">splines</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A><BR><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:start" HREF="#d:start">start</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:startType">startType</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>fdp, neato only</TD>
-</TR>
-<TR>
- <TD><A ID="a:style" HREF="#d:style">style</A></TD>
- <TD>ENCG</TD>
- <TD><A HREF="#k:style">style</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:stylesheet" HREF="#d:stylesheet">stylesheet</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg only</TD>
-</TR>
-<TR>
- <TD><A ID="a:tailURL" HREF="#d:tailURL">tailURL</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:tail_lp" HREF="#d:tail_lp">tail_lp</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:point">point</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>write only</TD>
-</TR>
-<TR>
- <TD><A ID="a:tailclip" HREF="#d:tailclip">tailclip</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER">true</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:tailhref" HREF="#d:tailhref">tailhref</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:taillabel" HREF="#d:taillabel">taillabel</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:lblString">lblString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:tailport" HREF="#d:tailport">tailport</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:portPos">portPos</A></TD>
- <TD ALIGN="CENTER">center</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:tailtarget" HREF="#d:tailtarget">tailtarget</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER"><none></TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:tailtooltip" HREF="#d:tailtooltip">tailtooltip</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, cmap only</TD>
-</TR>
-<TR>
- <TD><A ID="a:target" HREF="#d:target">target</A></TD>
- <TD>ENGC</TD>
- <TD><A HREF="#k:escString">escString</A><BR><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER"><none></TD>
- <TD></TD>
- <TD>svg, map only</TD>
-</TR>
-<TR>
- <TD><A ID="a:tooltip" HREF="#d:tooltip">tooltip</A></TD>
- <TD>NEC</TD>
- <TD><A HREF="#k:escString">escString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD>svg, cmap only</TD>
-</TR>
-<TR>
- <TD><A ID="a:truecolor" HREF="#d:truecolor">truecolor</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:bool">bool</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>bitmap output only</TD>
-</TR>
-<TR>
- <TD><A ID="a:vertices" HREF="#d:vertices">vertices</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:pointList">pointList</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>write only</TD>
-</TR>
-<TR>
- <TD><A ID="a:viewport" HREF="#d:viewport">viewport</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:viewPort">viewPort</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:voro_margin" HREF="#d:voro_margin">voro_margin</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.05</TD>
- <TD>0.0</TD>
- <TD>not dot</TD>
-</TR>
-<TR>
- <TD><A ID="a:weight" HREF="#d:weight">weight</A></TD>
- <TD>E</TD>
- <TD><A HREF="#k:int">int</A><BR><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">1</TD>
- <TD>0(dot,twopi)<BR>1(neato,fdp)</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:width" HREF="#d:width">width</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.75</TD>
- <TD>0.01</TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:xdotversion" HREF="#d:xdotversion">xdotversion</A></TD>
- <TD>G</TD>
- <TD><A HREF="#k:string">string</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>xdot only</TD>
-</TR>
-<TR>
- <TD><A ID="a:xlabel" HREF="#d:xlabel">xlabel</A></TD>
- <TD>EN</TD>
- <TD><A HREF="#k:lblString">lblString</A></TD>
- <TD ALIGN="CENTER">""</TD>
- <TD></TD>
- <TD></TD>
-</TR>
-<TR>
- <TD><A ID="a:xlp" HREF="#d:xlp">xlp</A></TD>
- <TD>NE</TD>
- <TD><A HREF="#k:point">point</A></TD>
- <TD ALIGN="CENTER"></TD>
- <TD></TD>
- <TD>write only</TD>
-</TR>
-<TR>
- <TD><A ID="a:z" HREF="#d:z">z</A></TD>
- <TD>N</TD>
- <TD><A HREF="#k:double">double</A></TD>
- <TD ALIGN="CENTER">0.0</TD>
- <TD>-MAXFLOAT<BR>-1000</TD>
- <TD></TD>
-</TR>
-</TABLE>
-<HR>
-<H1>Attribute Descriptions</H1>
-<DL>
-<DT><A ID="d:Damping" HREF="#a:Damping"><STRONG>Damping</STRONG></A>
-<DD>Factor damping force motions. On each iteration, a nodes movement
-is limited to this factor of its potential motion. By being less than
-1.0, the system tends to ``cool'', thereby preventing cycling.
-
-<DT><A ID="d:K" HREF="#a:K"><STRONG>K</STRONG></A>
-<DD>Spring constant used in virtual physical model. It roughly corresponds
-to an ideal edge length (in inches), in that increasing K tends to
-increase the distance between nodes.
-Note that the edge attribute <A HREF=#d:len>len</A> can be used to
-override this value for adjacent nodes.
-
-<DT><A ID="d:URL" HREF="#a:URL"><STRONG>URL</STRONG></A>
-<DD>Hyperlinks incorporated into device-dependent output.
-At present, used in ps2, cmap, i*map and svg formats.
-For all these formats, URLs can be attached to nodes, edges and
-clusters. URL attributes can also be attached to the root graph in ps2,
-cmap and i*map formats. This serves as the base URL for relative URLs in the
-former, and as the default image map file in the latter.
-<P>
-For svg, cmapx and imap output, the active area for a node is its
-visible image.
-For example, an unfilled
-node with no drawn boundary will only be active on its label.
-For other output, the active area is its bounding box.
-The active area for a cluster is its bounding box.
-For edges, the active areas are small circles where the edge contacts its head
-and tail nodes. In addition, for svg, cmapx and imap, the active area
-includes a thin polygon approximating the edge. The circles may
-overlap the related node, and the edge URL dominates.
-If the edge has a label, this will also be active.
-Finally, if the edge has a head or tail label, this will also be active.
-<P>
-Note that, for edges, the attributes <A HREF=#d:headURL>headURL</A>,
-<A HREF=#d:tailURL>tailURL</A>, <A HREF=#d:labelURL>labelURL</A> and
-<A HREF=#d:edgeURL>edgeURL</A> allow control of various parts of an
-edge.
-Also note that, if active areas of two edges overlap, it is unspecified
-which area dominates.
-
-<DT><A ID="d:_background" HREF="#a:_background"><STRONG>_background</STRONG></A>
-<DD>A string in the <A HREF=output.html#d:xdot>xdot format</A> specifying an arbitrary background.
-During rendering, the canvas is first filled as described in the
-<A href=#d:bgcolor>bgcolor attribute</A>.
-Then, if <b>_background</b> is defined, the graphics
-operations described in the string are performed on the canvas.
-
-<DT><A ID="d:area" HREF="#a:area"><STRONG>area</STRONG></A>
-<DD>Indicates the preferred area for a node or empty cluster when laid out by patchwork.
-
-<DT><A ID="d:arrowhead" HREF="#a:arrowhead"><STRONG>arrowhead</STRONG></A>
-<DD>Style of arrowhead on the head node of an edge.
-This will only appear if the <A HREF=#d:dir>dir</A> attribute
-is "forward" or "both".
-See the <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:arrowsize" HREF="#a:arrowsize"><STRONG>arrowsize</STRONG></A>
-<DD>Multiplicative scale factor for arrowheads.
-
-<DT><A ID="d:arrowtail" HREF="#a:arrowtail"><STRONG>arrowtail</STRONG></A>
-<DD>Style of arrowhead on the tail node of an edge.
-This will only appear if the <A HREF=#d:dir>dir</A> attribute
-is "back" or "both".
-See the <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:bb" HREF="#a:bb"><STRONG>bb</STRONG></A>
-<DD>Bounding box of drawing in points.
-
-<DT><A ID="d:bgcolor" HREF="#a:bgcolor"><STRONG>bgcolor</STRONG></A>
-<DD>When attached to the root graph, this color is used as the background for
-entire canvas. When a cluster attribute, it is used as the initial
-background for the cluster. If a cluster has a filled
-<A HREF=#d:style>style</A>, the
-cluster's <A HREF=#d:fillcolor>fillcolor</A> will overlay the
-background color.
-<P>
-If the value is a <A HREF=#k:colorList>colorList</A>, a gradient fill is
-used. By default, this is a linear fill; setting <TT>style=radial</TT> will
-cause a radial fill. At present, only two colors are used. If the second
-color (after a colon) is missing, the default color is used for it.
-See also the <A HREF=#d:gradientangle>gradientangle</A> attribute
-for setting the gradient angle.
-<P>
-For certain output formats, such as PostScript, no fill is done for
-the root graph unless
-<b>bgcolor</b> is explicitly set. For bitmap formats, however,
-the bits need to be
-initialized to something, so the canvas is filled with white by default.
-This means that if the bitmap output is included in some other
-document, all of the bits within the bitmap's bounding box will be
-set, overwriting whatever color or graphics were already on the page.
-If this effect is not desired, and you only want to set bits explicitly
-assigned in drawing the graph, set <B>bgcolor</B>="transparent".
-
-<DT><A ID="d:center" HREF="#a:center"><STRONG>center</STRONG></A>
-<DD>If true, the drawing is centered in the output canvas.
-
-<DT><A ID="d:charset" HREF="#a:charset"><STRONG>charset</STRONG></A>
-<DD>Specifies the character encoding used when interpreting string input
-as a text label. The default value is <TT>"UTF-8"</TT>.
-The other legal value is <TT>"iso-8859-1"</TT> or,
-equivalently,
-<TT>"Latin1"</TT>. The <B>charset</B> attribute is case-insensitive.
-Note that if the character encoding used in the input does not
-match the <B>charset</B> value, the resulting output may be very strange.
-
-<DT><A ID="d:class" HREF="#a:class"><STRONG>class</STRONG></A>
-<DD>Classnames to attach to the node, edge, graph, or cluster's SVG element.
-Combine with <a href="#d:stylesheet">stylesheet</a> for styling SVG output
-using CSS classnames.
-<p>
-Multiple space-separated classes are supported.
-<p>
-<pre>
-digraph G {
- graph [class="cats"];
-
- subgraph cluster_big {
- graph [class="big_cats"];
-
- "Lion" [class="yellow social"];
- "Snow Leopard" [class="white solitary"];
- };
-}
-</pre>
-
-<DT><A ID="d:clusterrank" HREF="#a:clusterrank"><STRONG>clusterrank</STRONG></A>
-<DD>Mode used for handling clusters. If <B>clusterrank</B> is "local", a
-subgraph whose name begins with "cluster" is given special treatment.
-The subgraph is laid out separately, and then integrated as a unit into
-its parent graph, with a bounding rectangle drawn about it.
-If the cluster has a <A HREF=#d:label>label</A> parameter, this label
-is displayed within the rectangle.
-Note also that there can be clusters within clusters.
-At present, the modes "global" and "none"
-appear to be identical, both turning off the special cluster processing.
-
-<DT><A ID="d:color" HREF="#a:color"><STRONG>color</STRONG></A>
-<DD>Basic drawing color for graphics, not text. For the latter, use the
-<A HREF=#d:fontcolor>fontcolor</A> attribute.
-<P>
-For edges, the value
-can either be a single color or a <A HREF=#k:colorList>colorList</A>.
-In the latter case, if colorList has no fractions,
-the edge is drawn using parallel splines or lines,
-one for each color in the list, in the order given.
-The head arrow, if any, is drawn using the first color in the list,
-and the tail arrow, if any, the second color. This supports the common
-case of drawing opposing edges, but using parallel splines instead of
-separately routed multiedges.
-If any fraction is used, the colors are drawn in series, with each color
-being given roughly its specified fraction of the edge.
-For example, the graph
-<PRE>
-digraph G {
- a -> b [dir=both color="red:blue"]
- c -> d [dir=none color="green:red;0.25:blue"]
-}
-</PRE>
-yields<BR>
-<IMG SRC="colorlist.gif">
-
-<DT><A ID="d:colorscheme" HREF="#a:colorscheme"><STRONG>colorscheme</STRONG></A>
-<DD>This attribute specifies a color scheme namespace. If defined, it specifies
-the context for interpreting color names. In particular, if a
-<A HREF=#k:color>color</A> value has form <TT>"xxx"</TT> or <TT>"//xxx"</TT>,
-then the
-color <TT>xxx</TT> will be evaluated according to the current color scheme.
-If no color scheme is set, the standard X11 naming is used.
-For example, if <TT>colorscheme=bugn9</TT>, then <TT>color=7</TT>
-is interpreted as <TT>"/bugn9/7"</TT>.
-
-<DT><A ID="d:comment" HREF="#a:comment"><STRONG>comment</STRONG></A>
-<DD>Comments are inserted into output. Device-dependent
-
-<DT><A ID="d:compound" HREF="#a:compound"><STRONG>compound</STRONG></A>
-<DD>If true, allow edges between clusters. (See <A HREF=#d:lhead>lhead</A>
-and <A HREF=#d:ltail>ltail</A> below.)
-
-<DT><A ID="d:concentrate" HREF="#a:concentrate"><STRONG>concentrate</STRONG></A>
-<DD>If true, use edge concentrators.
-This merges multiedges into a single edge and causes partially parallel
-edges to share part of their paths. The latter feature is not yet available
-outside of dot.
-
-<DT><A ID="d:constraint" HREF="#a:constraint"><STRONG>constraint</STRONG></A>
-<DD>If false, the edge is not used in ranking the nodes. For example,
-in the graph
-<PRE>
-digraph G {
- a -> c;
- a -> b;
- b -> c [constraint=false];
-}
-</PRE>
-the edge <CODE>b -> c</CODE> does not add a constraint during rank
-assignment, so the only constraints are that a be above b and c,
-yielding the graph:<BR>
-<IMG SRC="constraint.gif">
-
-<DT><A ID="d:decorate" HREF="#a:decorate"><STRONG>decorate</STRONG></A>
-<DD>If true, attach edge label to edge by a 2-segment
-polyline, underlining the label, then going to the closest point of spline.
-
-<DT><A ID="d:defaultdist" HREF="#a:defaultdist"><STRONG>defaultdist</STRONG></A>
-<DD>This specifies the distance between nodes in separate connected
-components. If set too small, connected components may overlap.
-Only applicable if <A HREF=#d:pack>pack</A>=false.
-
-<DT><A ID="d:dim" HREF="#a:dim"><STRONG>dim</STRONG></A>
-<DD>Set the number of dimensions used for the layout. The maximum value
-allowed is 10.
-
-<DT><A ID="d:dimen" HREF="#a:dimen"><STRONG>dimen</STRONG></A>
-<DD>Set the number of dimensions used for rendering.
-The maximum value allowed is 10.
-If both <TT>dimen</TT> and <TT>dim</TT> are set, the latter specifies
-the dimension used for layout, and the former for rendering.
-If only <TT>dimen</TT> is set, this is used for both layout and rendering
-dimensions.
-<P>
-Note that, at present, all aspects of rendering are 2D. This includes
-the shape and size of nodes, overlap removal, and edge routing. Thus,
-for <TT>dimen > 2</TT>, the only valid information is the <TT>pos</TT>
-attribute of the nodes.
-All other coordinates will be 2D and, at best, will reflect a projection
-of a higher-dimensional point onto the plane.
-
-<DT><A ID="d:dir" HREF="#a:dir"><STRONG>dir</STRONG></A>
-<DD>Set edge type for drawing arrowheads. This indicates which ends of the
-edge should be decorated with an arrowhead. The actual style of the
-arrowhead can be specified using the <A HREF=#d:arrowhead>arrowhead</A>
-and <A HREF=#d:arrowtail>arrowtail</A> attributes.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:diredgeconstraints" HREF="#a:diredgeconstraints"><STRONG>diredgeconstraints</STRONG></A>
-<DD>Only valid when <A HREF=#d:mode>mode</A>="ipsep".
-If true, constraints are generated for each edge in the largest (heuristic)
-directed acyclic subgraph such that the edge must point downwards.
-If "hier", generates level constraints similar to those used with
-<A HREF=#d:mode>mode</A>="hier". The main difference is that, in the latter
-case, only these constraints are involved, so a faster solver can be used.
-
-<DT><A ID="d:distortion" HREF="#a:distortion"><STRONG>distortion</STRONG></A>
-<DD>Distortion factor for <A HREF=#d:shape><B>shape</B></A>=polygon.
-Positive values cause top part to
-be larger than bottom; negative values do the opposite.
-
-<DT><A ID="d:dpi" HREF="#a:dpi"><STRONG>dpi</STRONG></A>
-<DD>This specifies the expected number of pixels per inch on a display device.
-For bitmap output, this guarantees that text rendering will be
-done more accurately, both in size and in placement. For SVG output,
-it is used to guarantee that the dimensions in the output correspond to
-the correct number of points or inches.
-
-<DT><A ID="d:edgeURL" HREF="#a:edgeURL"><STRONG>edgeURL</STRONG></A>
-<DD>If <B>edgeURL</B> is defined, this is the link used for the non-label
-parts of an edge. This value overrides any <A HREF=#d:URL>URL</A>
-defined for the edge.
-Also, this value is used near the head or tail node unless overridden
-by a <A HREF=#d:headURL>headURL</A> or <A HREF=#d:tailURL>tailURL</A> value,
-respectively.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:edgehref" HREF="#a:edgehref"><STRONG>edgehref</STRONG></A>
-<DD>Synonym for <A HREF=#d:edgeURL>edgeURL</A>.
-
-<DT><A ID="d:edgetarget" HREF="#a:edgetarget"><STRONG>edgetarget</STRONG></A>
-<DD>If the edge has a <A HREF=#d:URL>URL</A> or <A HREF=#d:edgeURL>edgeURL</A>
-attribute, this attribute determines which window of the
-browser is used
-for the URL attached to the non-label part of the edge.
-Setting it to "_graphviz" will open a new window if it
-doesn't already exist, or reuse it if it does.
-If undefined, the value of the <A HREF=#d:target>target</A> is used.
-
-<DT><A ID="d:edgetooltip" HREF="#a:edgetooltip"><STRONG>edgetooltip</STRONG></A>
-<DD>Tooltip annotation attached to the non-label part of an edge.
-This is used only if the edge has a <A HREF=#d:URL>URL</A>
-or <A HREF=#d:edgeURL>edgeURL</A> attribute.
-
-<DT><A ID="d:epsilon" HREF="#a:epsilon"><STRONG>epsilon</STRONG></A>
-<DD>Terminating condition. If the length squared of all energy gradients are
-< <B>epsilon</B>, the algorithm stops.
-
-<DT><A ID="d:esep" HREF="#a:esep"><STRONG>esep</STRONG></A>
-<DD>Margin used around polygons for purposes of spline edge routing.
-The interpretation is the same as given for <A HREF=#d:sep>sep</A>.
-This should normally be strictly less than <A HREF=#d:sep>sep</A>.
-
-<DT><A ID="d:fillcolor" HREF="#a:fillcolor"><STRONG>fillcolor</STRONG></A>
-<DD>Color used to fill the background of a node or cluster
-assuming <A HREF=#d:style>style</A>=filled, or a filled arrowhead.
-If <B>fillcolor</B> is not defined, <A HREF=#d:color>color</A> is
-used. (For clusters, if <B>color</B> is not defined,
-<A HREF=#d:bgcolor>bgcolor</A> is used.) If this is not defined,
-the default is used, except for
-<A HREF=#d:shape><B>shape</B></A>=point or when the output
-format is MIF,
-which use black by default.
-<P>
-If the value is a <A HREF=#k:colorList>colorList</A>, a gradient fill is
-used. By default, this is a linear fill; setting <TT>style=radial</TT> will
-cause a radial fill. At present, only two colors are used. If the second
-color (after a colon) is missing, the default color is used for it.
-See also the <A HREF=#d:gradientangle>gradientangle</A> attribute
-for setting the gradient angle.
-<P>
-Note that a cluster inherits the root graph's attributes if defined.
-Thus, if the root graph has defined a <B>fillcolor</B>, this will override a
-<B>color</B> or <B>bgcolor</B> attribute set for the cluster.
-
-<DT><A ID="d:fixedsize" HREF="#a:fixedsize"><STRONG>fixedsize</STRONG></A>
-<DD>If <tt>false</tt>, the size of a node is determined by smallest width and height
-needed to contain its label and image, if any, with a margin specified by
-the <A HREF=#d:margin><TT>margin</TT></A> attribute. The width
-and height must also be at least as large as the sizes specified by the
-<A HREF=#d:width><TT>width</TT></A> and
-<A HREF=#d:height><TT>height</TT></A> attributes, which specify
-the minimum values for these parameters.
-<P>
-If <tt>true</tt>, the node size is specified by the values of the
-<A HREF=#d:width><TT>width</TT></A>
-and <A HREF=#d:height><TT>height</TT></A> attributes only
-and is not expanded to contain the text label.
-There will be a warning if the label (with margin)
-cannot fit within these limits.
-<P>
-If the <A HREF=attrs.html#d:fixedsize><TT>fixedsize</TT></A> attribute is set
-to <tt>shape</tt>, the <A HREF=#d:width><TT>width</TT></A> and
-<A HREF=#d:height><TT>height</TT></A> attributes also determine the size
-of the node shape, but the label can be much larger. Both the label and
-shape sizes are used when avoiding node overlap, but all edges to the
-node ignore the label and only contact the node shape. No warning is given
-if the label is too large.
-
-<DT><A ID="d:fontcolor" HREF="#a:fontcolor"><STRONG>fontcolor</STRONG></A>
-<DD>Color used for text.
-
-<DT><A ID="d:fontname" HREF="#a:fontname"><STRONG>fontname</STRONG></A>
-<DD>Font used for text. This very much depends on the output format and, for
-non-bitmap output such as PostScript or SVG, the availability of the font
-when the graph is displayed or printed. As such, it is best to rely on
-font faces that are generally available, such as Times-Roman, Helvetica or
-Courier.
-<P>
-How font names are resolved also depends on the underlying library that handles
-font name resolution.
-If Graphviz was built using the
-<A HREF=http://pdx.freedesktop.org/~fontconfig/fontconfig-user.html>fontconfig library</A>,
-the latter library will be used to search for the font.
-See the commands <B>fc-list</B>, <B>fc-match</B> and the other fontconfig commands for how
-names are resolved and which fonts are available.
-Other systems may provide their own font package, such as Quartz for OS X.
-<P>
-Note that various font attributes, such as weight and slant, can be built into the
-font name. Unfortunately, the syntax varies depending on which font system is dominant.
-Thus, using <TT>fontname="times bold italic"</TT> will produce a bold, slanted Times font
-using Pango, the usual main font library. Alternatively,
-<TT>fontname="times:italic"</TT> will produce a slanted
-Times font from fontconfig, while <TT>fontname="times-bold"</TT> will resolve to a bold
-Times using Quartz. You will need
-to ascertain which package is used by your Graphviz system and refer to the relevant
-documentation.
-<P>
-If Graphviz is not built with a high-level font library, <TT>fontname</TT> will be
-considered the name of a Type 1 or True Type font file.
-If you specify <TT>fontname=schlbk</TT>, the tool will look for a
-file named <TT>schlbk.ttf</TT> or <TT>schlbk.pfa</TT> or <TT>schlbk.pfb</TT>
-in one of the directories specified by
-the <A HREF=#d:fontpath>fontpath</A> attribute.
-The lookup does support various aliases for the common fonts.
-
-<DT><A ID="d:fontnames" HREF="#a:fontnames"><STRONG>fontnames</STRONG></A>
-<DD>Allows user control of how basic fontnames are represented in SVG output.
-If <TT>fontnames</TT> is undefined or <TT>"svg"</TT>,
-the output will try to use known SVG fontnames. For example, the
-default font <TT>"Times-Roman"</TT> will be mapped to the
-basic SVG font <TT>"serif"</TT>. This can be overridden by setting
-<TT>fontnames</TT> to <TT>"ps"</TT> or <TT>"gd"</TT>.
-In the former case, known PostScript font names such as
-<TT>"Times-Roman"</TT> will be used in the output.
-In the latter case, the fontconfig font conventions
-are used. Thus, <TT>"Times-Roman"</TT> would be treated as
-<TT>"Nimbus Roman No9 L"</TT>. These last two options are useful
-with SVG viewers that support these richer fontname spaces.
-
-<DT><A ID="d:fontpath" HREF="#a:fontpath"><STRONG>fontpath</STRONG></A>
-<DD>Directory list used by libgd to search for bitmap fonts if Graphviz
-was not built with the fontconfig library.
-If <B>fontpath</B> is not set, the environment
-variable <TT>DOTFONTPATH</TT> is checked.
-If that is not set, <TT>GDFONTPATH</TT> is checked.
-If not set, libgd uses its compiled-in font path.
-Note that fontpath is an attribute of the root graph.
-
-<DT><A ID="d:fontsize" HREF="#a:fontsize"><STRONG>fontsize</STRONG></A>
-<DD>Font size, <A HREF=#points>in points</A>, used for text.
-
-<DT><A ID="d:forcelabels" HREF="#a:forcelabels"><STRONG>forcelabels</STRONG></A>
-<DD>If true, all <A HREF=#d:xlabel><B>xlabel</B></A> attributes are placed, even if there is some overlap with nodes
-or other labels.
-
-<DT><A ID="d:gradientangle" HREF="#a:gradientangle"><STRONG>gradientangle</STRONG></A>
-<DD>If a gradient fill is being used, this determines the angle of the fill. For linear fills, the colors transform
-along a line specified by the angle and the center of the object. For radial fills, a value of zero causes the
-colors to transform radially from the center; for non-zero values, the colors transform from a point near the
-object's periphery as specified by the value.
-<P>
-If unset, the default angle is 0.
-
-<DT><A ID="d:group" HREF="#a:group"><STRONG>group</STRONG></A>
-<DD>If the end points of an edge belong to the same group, i.e., have the
-same group attribute, parameters are set to avoid crossings and keep
-the edges straight.
-
-<DT><A ID="d:headURL" HREF="#a:headURL"><STRONG>headURL</STRONG></A>
-<DD>If <B>headURL</B> is defined, it is
-output as part of the head label of the edge.
-Also, this value is used near the head node, overriding any
-<A HREF=#d:URL>URL</A> value.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:head_lp" HREF="#a:head_lp"><STRONG>head_lp</STRONG></A>
-<DD>Position of an edge's head label, <A HREF=#points>in points</A>.
-The position indicates the center of the label.
-
-<DT><A ID="d:headclip" HREF="#a:headclip"><STRONG>headclip</STRONG></A>
-<DD>If true, the head of an edge is clipped to the boundary of the head node;
-otherwise, the end of the edge goes to the center of the node, or the
-center of a port, if applicable.
-
-<DT><A ID="d:headhref" HREF="#a:headhref"><STRONG>headhref</STRONG></A>
-<DD>Synonym for <A HREF=#d:headURL>headURL</A>.
-
-<DT><A ID="d:headlabel" HREF="#a:headlabel"><STRONG>headlabel</STRONG></A>
-<DD>Text label to be placed near head of edge.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:headport" HREF="#a:headport"><STRONG>headport</STRONG></A>
-<DD>Indicates where on the head node to attach the head of the edge.
-In the default case, the edge is aimed towards the center of the node,
-and then clipped at the node boundary.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:headtarget" HREF="#a:headtarget"><STRONG>headtarget</STRONG></A>
-<DD>If the edge has a <A HREF=#d:headURL>headURL</A>,
-this attribute determines which window of the
-browser is used
-for the URL. Setting it to "_graphviz" will open a new window if it
-doesn't already exist, or reuse it if it does.
-If undefined, the value of the <A HREF=#d:target>target</A> is used.
-
-<DT><A ID="d:headtooltip" HREF="#a:headtooltip"><STRONG>headtooltip</STRONG></A>
-<DD>Tooltip annotation attached to the head of an edge. This is used only
-if the edge has a <A HREF=#d:headURL>headURL</A> attribute.
-
-<DT><A ID="d:height" HREF="#a:height"><STRONG>height</STRONG></A>
-<DD>Height of node, in inches. This is taken as the initial, minimum height
-of the node. If <A HREF=#d:fixedsize><B>fixedsize</B></A> is true, this
-will be the final height of the node. Otherwise, if the node label
-requires more height to fit, the node's height will be increased to
-contain the label. Note also that, if the output format is dot, the
-value given to <B>height</B> will be the final value.
-<P>
-If the node shape is regular, the width and height are made identical.
-In this case, if either the width or the height is set explicitly,
-that value is used.
-In this case, if both the width or the height are set explicitly,
-the maximum of the two values is used.
-If neither is set explicitly, the minimum of the two default values
-is used.
-
-<DT><A ID="d:href" HREF="#a:href"><STRONG>href</STRONG></A>
-<DD>Synonym for <A HREF=#d:URL>URL</A>.
-
-<DT><A ID="d:id" HREF="#a:id"><STRONG>id</STRONG></A>
-<DD>Allows the graph author to provide an id for graph objects which is to be included in the output.
-Normal "\N", "\E", "\G" substitutions are applied.
-If provided, it is the responsibility of the provider to keep
-its values sufficiently unique for its intended downstream use.
-Note, in particular, that "\E" does not provide a unique id for multi-edges.
-If no id attribute is provided, then a unique internal id is used. However,
-this value is unpredictable by the graph writer.
-An externally provided id is not used internally.
-<P>
-If the graph provides an id attribute, this will be used as a prefix for
-internally generated attributes. By making these distinct, the user
-can include multiple image maps in the same document.
-
-<DT><A ID="d:image" HREF="#a:image"><STRONG>image</STRONG></A>
-<DD>Gives the name of a file containing an image to be displayed inside
-a node. The image file must be in one of the recognized
-<A HREF=output.html#d:image_fmts>formats</A>,
-typically JPEG, PNG, GIF, BMP, SVG or Postscript, and be able to be converted
-into the desired output format.
-<P>
-The file must contain the image size information. This is usually trivially
-true for the bitmap formats. For PostScript, the file must contain a
-line starting with <TT>%%BoundingBox: </TT> followed by four integers
-specifying the lower left x and y coordinates and the upper right x and y
-coordinates of the bounding box for the image, the coordinates being in
-points. An SVG image file must contain <TT>width</TT> and <TT>height</TT>
-attributes, typically as part of the <TT>svg</TT> element.
-The values for these should have the form of a floating point number,
-followed by optional units, e.g., <TT>width="76pt"</TT>.
-Recognized units are <TT>in</TT>, <TT>px</TT>,
-<TT>pc</TT>, <TT>pt</TT>, <TT>cm</TT> and <TT>mm</TT> for inches, pixels,
-picas, points, centimeters and millimeters, respectively.
-The default unit is points.
-<P>
-Unlike with the <A HREF=#d:shapefile>shapefile</A> attribute,
-the image is treated as node
-content rather than the entire node. In particular, an image can
-be contained in a node of any shape, not just a rectangle.
-
-<DT><A ID="d:imagepath" HREF="#a:imagepath"><STRONG>imagepath</STRONG></A>
-<DD>Specifies a list of directories in which to look for image files as specified by the
-<a href="#d:image">image</a> attribute or using the <TT>IMG</TT> element in
-<a href="shapes.html#html">HTML-like labels</a>.
-The string should be a list of (absolute or relative) pathnames, each separated by
-a semicolon (for Windows) or a colon (all other OS).
-The first directory in which a file of the given name is found will be used to
-load the image. If <tt>imagepath</tt> is not set, relative pathnames for the image
-file will be interpreted with respect to the current working directory.
-
-<DT><A ID="d:imagepos" HREF="#a:imagepos"><STRONG>imagepos</STRONG></A>
-<DD>Attribute controlling how an image is positioned within its containing node. This
-only has an effect when the image is smaller than the containing node. The
-default is to be centered both horizontally and vertically. Valid values:
-<TABLE>
-<TR><TD>tl</TD><TD>Top Left</TD></TR>
-<TR><TD>tc</TD><TD>Top Centered</TD></TR>
-<TR><TD>tr</TD><TD>Top Right</TD></TR>
-<TR><TD>ml</TD><TD>Middle Left</TD></TR>
-<TR><TD>mc</TD><TD>Middle Centered <I>(the default)</I></TD></TR>
-<TR><TD>mr</TD><TD>Middle Right</TD></TR>
-<TR><TD>bl</TD><TD>Bottom Left</TD></TR>
-<TR><TD>bc</TD><TD>Bottom Centered</TD></TR>
-<TR><TD>br</TD><TD>Bottom Right</TD></TR>
-</TABLE>
-
-<DT><A ID="d:imagescale" HREF="#a:imagescale"><STRONG>imagescale</STRONG></A>
-<DD>Attribute controlling how an image fills its
-containing node. In general, the image is given its natural size,
-(cf. <A HREF=#d:dpi>dpi</A>),
-and the node size is made large enough to contain its image, its
-label, its margin, and its peripheries.
-Its width and height will also be at least as large as its
-minimum <A HREF=#d:width>width</A> and <A HREF=#d:height>height</A>.
-If, however, <TT>fixedsize=true</TT>,
-the width and height attributes specify the exact size of the node.
-<P>
-During rendering, in the default case (<TT>imagescale=false</TT>),
-the image retains its natural size.
-If <TT>imagescale=true</TT>,
-the image is uniformly scaled (i.e., its aspect ratio is
-preserved) to fit inside the node.
-At least one dimension of the image will be as large as possible
-given the size of the node.
-When <TT>imagescale=width</TT>,
-the width of the image is scaled to fill the node width.
-The corresponding property holds when <TT>imagescale=height</TT>.
-When <TT>imagescale=both</TT>,
-both the height and the width are scaled separately to fill the node.
-<P>
-In all cases, if a dimension of the image is larger than the
-corresponding dimension of the node, that dimension of the
-image is scaled down to fit the node. As with the case of
-expansion, if <TT>imagescale=true</TT>, width and height are
-scaled uniformly.
-
-<DT><A ID="d:inputscale" HREF="#a:inputscale"><STRONG>inputscale</STRONG></A>
-<DD>For layout algorithms that support initial input positions (specified by the <A HREF=#d:pos><B>pos</B></A> attribute),
-this attribute can be used to appropriately scale the values. By default, fdp and neato interpret
-the x and y values of pos as being in inches. (<B>NOTE</B>: neato -n(2) treats the coordinates as
-being in points, being the unit used by the layout algorithms for the pos attribute.) Thus, if
-the graph has pos attributes in points, one should set <TT>inputscale=72</TT>.
-This can also be set on the command line using the <A HREF=command.html#minusK><TT>-s</TT> flag</A> flag.
-<P>
-If not set, no scaling is done and the units on input are treated as inches.
-A value of 0 is equivalent to <TT>inputscale=72</TT>.
-
-<DT><A ID="d:label" HREF="#a:label"><STRONG>label</STRONG></A>
-<DD>Text label attached to objects.
-If a node's <A HREF=#d:shape>shape</A> is record, then the label can
-have a <A HREF=shapes.html#record>special format</A>
-which describes the record layout.
-<P>
-Note that a node's default label is "\N", so the node's name or ID becomes
-its label. Technically, a node's name can be an HTML string but this will not
-mean that the node's label will be interpreted as an <a href="shapes.html#html">HTML-like label</a>. This is
-because the node's actual label is an ordinary string, which will be replaced
-by the raw bytes stored in the node's name.
-To get an HTML-like label, the label attribute value itself must be an HTML string.
-
-<DT><A ID="d:labelURL" HREF="#a:labelURL"><STRONG>labelURL</STRONG></A>
-<DD>If <B>labelURL</B> is defined, this is the link used for the label
-of an edge. This value overrides any <A HREF=#d:URL>URL</A>
-defined for the edge.
-
-<DT><A ID="d:label_scheme" HREF="#a:label_scheme"><STRONG>label_scheme</STRONG></A>
-<DD>The value indicates
-whether to treat a node whose name has the form |edgelabel|* as a special node representing an edge label.
-The default (0) produces no effect.
-If the attribute is set to 1, sfdp uses a penalty-based method to make that kind of node close to the
-center of its neighbor. With a value of 2, sfdp uses a penalty-based method to make that kind of node
-close to the old center of its neighbor. Finally, a value of 3 invokes a two-step process of overlap
-removal and straightening.
-
-<DT><A ID="d:labelangle" HREF="#a:labelangle"><STRONG>labelangle</STRONG></A>
-<DD>This, along with <A HREF=#d:labeldistance>labeldistance</A>, determine
-where the
-headlabel (taillabel) are placed with respect to the head (tail)
-in polar coordinates. The origin in the coordinate system is
-the point where the edge touches the node. The ray of 0 degrees
-goes from the origin back along the edge, parallel to the edge
-at the origin.
-<P>
-The angle, in degrees, specifies the rotation from the 0 degree ray,
-with positive angles moving counterclockwise and negative angles
-moving clockwise.
-
-<DT><A ID="d:labeldistance" HREF="#a:labeldistance"><STRONG>labeldistance</STRONG></A>
-<DD>Multiplicative scaling factor adjusting the distance that
-the headlabel(taillabel) is from the head(tail) node.
-The default distance is 10 points. See <A HREF=#d:labelangle>labelangle</A>
-for more details.
-
-<DT><A ID="d:labelfloat" HREF="#a:labelfloat"><STRONG>labelfloat</STRONG></A>
-<DD>If true, allows edge labels to be less constrained in position.
-In particular, it may appear on top of other edges.
-
-<DT><A ID="d:labelfontcolor" HREF="#a:labelfontcolor"><STRONG>labelfontcolor</STRONG></A>
-<DD>Color used for headlabel and taillabel.
-If not set, defaults to edge's fontcolor.
-
-<DT><A ID="d:labelfontname" HREF="#a:labelfontname"><STRONG>labelfontname</STRONG></A>
-<DD>Font used for headlabel and taillabel.
-If not set, defaults to edge's fontname.
-
-<DT><A ID="d:labelfontsize" HREF="#a:labelfontsize"><STRONG>labelfontsize</STRONG></A>
-<DD>Font size, <A HREF=#points>in points</A>, used for headlabel and taillabel.
-If not set, defaults to edge's fontsize.
-
-<DT><A ID="d:labelhref" HREF="#a:labelhref"><STRONG>labelhref</STRONG></A>
-<DD>Synonym for <A HREF=#d:labelURL>labelURL</A>.
-
-<DT><A ID="d:labeljust" HREF="#a:labeljust"><STRONG>labeljust</STRONG></A>
-<DD>Justification for cluster labels. If "r", the label
-is right-justified within bounding rectangle; if "l", left-justified;
-else the label is centered.
-Note that a subgraph inherits attributes from its parent. Thus, if
-the root graph sets <B>labeljust</B> to "l", the subgraph inherits
-this value.
-
-<DT><A ID="d:labelloc" HREF="#a:labelloc"><STRONG>labelloc</STRONG></A>
-<DD>Vertical placement of labels for nodes, root graphs and clusters.
-<P>
-For graphs and clusters, only "t" and "b" are allowed, corresponding
-to placement at the top and bottom, respectively.
-By default, root
-graph labels go on the bottom and cluster labels go on the top.
-Note that a subgraph inherits attributes from its parent. Thus, if
-the root graph sets <B>labelloc</B> to "b", the subgraph inherits
-this value.
-<P>
-For nodes, this attribute is used only when the height of the node
-is larger than the height of its label.
-If <TT>labelloc</TT> is set to "t", "c", or "b", the label is aligned
-with the top, centered, or aligned with the bottom of the node, respectively.
-In the default case, the label is vertically centered.
-
-<DT><A ID="d:labeltarget" HREF="#a:labeltarget"><STRONG>labeltarget</STRONG></A>
-<DD>If the edge has a <A HREF=#d:URL>URL</A> or <A HREF=#d:labelURL>labelURL</A>
-attribute, this attribute determines which window of the
-browser is used
-for the URL attached to the label.
-Setting it to "_graphviz" will open a new window if it
-doesn't already exist, or reuse it if it does.
-If undefined, the value of the <A HREF=#d:target>target</A> is used.
-
-<DT><A ID="d:labeltooltip" HREF="#a:labeltooltip"><STRONG>labeltooltip</STRONG></A>
-<DD>Tooltip annotation attached to label of an edge.
-This is used only if the edge has a <A HREF=#d:URL>URL</A>
-or <A HREF=#d:labelURL>labelURL</A> attribute.
-
-<DT><A ID="d:landscape" HREF="#a:landscape"><STRONG>landscape</STRONG></A>
-<DD>If true, the graph is rendered in landscape mode. Synonymous with
-<A HREF=#d:rotate><TT>rotate=90</TT></A> or
-<A HREF=#d:orientation><TT>orientation=landscape</TT></A>.
-
-<DT><A ID="d:layer" HREF="#a:layer"><STRONG>layer</STRONG></A>
-<DD>Specifies layers in which the node, edge or cluster is present.
-
-<DT><A ID="d:layerlistsep" HREF="#a:layerlistsep"><STRONG>layerlistsep</STRONG></A>
-<DD>Specifies the separator characters used to split
-an attribute of type <A HREF=#k:layerRange>layerRange</A> into a list of ranges.
-
-<DT><A ID="d:layers" HREF="#a:layers"><STRONG>layers</STRONG></A>
-<DD>Specifies a linearly ordered list of layer names attached to the graph
-The graph is then output in separate layers. Only those components
-belonging to the current output layer appear. For more information,
-see the page <A HREF="../../../faq/#FaqOverlays">How to use drawing layers (overlays)</A>.
-
-<DT><A ID="d:layerselect" HREF="#a:layerselect"><STRONG>layerselect</STRONG></A>
-<DD>Selects a list of layers to be emitted.
-
-<DT><A ID="d:layersep" HREF="#a:layersep"><STRONG>layersep</STRONG></A>
-<DD>Specifies the separator characters used to split the
-<A HREF=#d:layers>layers</A> attribute into a list of layer names.
-
-<DT><A ID="d:layout" HREF="#a:layout"><STRONG>layout</STRONG></A>
-<DD>Specifies the name of the layout algorithm to use, such as "dot"
-or "neato". Normally, graphs should be kept independent of a type of
-layout. In some cases, however, it can be convenient to embed the type
-of layout desired within the graph. For example, a graph containing
-position information from a layout might want to record what the
-associated layout algorithm was.
-<P>
-This attribute takes precedence over
-the <A HREF=command.html#minusK>-K flag</A>
-or the actual command name used.
-
-<DT><A ID="d:len" HREF="#a:len"><STRONG>len</STRONG></A>
-<DD>Preferred edge length, in inches.
-
-<DT><A ID="d:levels" HREF="#a:levels"><STRONG>levels</STRONG></A>
-<DD>Number of levels allowed in the multilevel scheme.
-
-<DT><A ID="d:levelsgap" HREF="#a:levelsgap"><STRONG>levelsgap</STRONG></A>
-<DD>Specifies strictness of level constraints in neato
-when <TT><A HREF=#d:mode>mode</A>="ipsep" or "hier"</TT>.
-Larger positive values mean stricter constraints, which demand more
-separation between levels. On the other hand, negative values will relax
-the constraints by allowing some overlap between the levels.
-
-<DT><A ID="d:lhead" HREF="#a:lhead"><STRONG>lhead</STRONG></A>
-<DD>Logical head of an edge. When <A HREF=#d:compound><B>compound</B></A> is true,
-if <B>lhead</B> is defined and is the name of a cluster containing
-the real head,
-the edge is clipped to the boundary of the cluster.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:lheight" HREF="#a:lheight"><STRONG>lheight</STRONG></A>
-<DD>Height of graph or cluster label, in inches.
-
-<DT><A ID="d:lp" HREF="#a:lp"><STRONG>lp</STRONG></A>
-<DD>Label position, <A HREF=#points>in points</A>.
-The position indicates the center of the label.
-
-<DT><A ID="d:ltail" HREF="#a:ltail"><STRONG>ltail</STRONG></A>
-<DD>Logical tail of an edge. When <A HREF=#d:compound><B>compound</B></A> is true,
-if <B>ltail</B> is defined and is the name of a cluster
-containing the real tail,
-the edge is clipped to the boundary of the cluster.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:lwidth" HREF="#a:lwidth"><STRONG>lwidth</STRONG></A>
-<DD>Width of graph or cluster label, in inches.
-
-<DT><A ID="d:margin" HREF="#a:margin"><STRONG>margin</STRONG></A>
-<DD>For graphs, this sets x and y margins of canvas, in inches. If the margin
-is a single double, both margins are set equal to the given value.
-<P>
-Note that the margin is not part of the drawing but just empty space
-left around the drawing. It basically corresponds to a translation of
-drawing, as would be necessary to center a drawing on a page. Nothing
-is actually drawn in the margin. To actually extend the background of
-a drawing, see the <A HREF=#d:pad>pad</A> attribute.
-<P>
-For clusters, this specifies the space between the nodes in the cluster and
-the cluster bounding box. By default, this is 8 points.
-<P>
-For nodes, this attribute specifies space left around the node's label.
-By default, the value is <TT>0.11,0.055</TT>.
-
-<DT><A ID="d:maxiter" HREF="#a:maxiter"><STRONG>maxiter</STRONG></A>
-<DD>Sets the number of iterations used.
-
-<DT><A ID="d:mclimit" HREF="#a:mclimit"><STRONG>mclimit</STRONG></A>
-<DD>Multiplicative scale factor used to alter the MinQuit (default = 8)
-and MaxIter (default = 24) parameters used during crossing
-minimization. These correspond to the
-number of tries without improvement before quitting and the
-maximum number of iterations in each pass.
-
-<DT><A ID="d:mindist" HREF="#a:mindist"><STRONG>mindist</STRONG></A>
-<DD>Specifies the minimum separation between all nodes.
-
-<DT><A ID="d:minlen" HREF="#a:minlen"><STRONG>minlen</STRONG></A>
-<DD>Minimum edge length (rank difference between head and tail).
-
-<DT><A ID="d:mode" HREF="#a:mode"><STRONG>mode</STRONG></A>
-<DD>Technique for optimizing the layout. For neato, if <B>mode</B> is <TT>"major"</TT>,
-neato uses stress majorization. If <B>mode</B> is <TT>"KK"</TT>,
-neato uses a version of the gradient descent method. The only advantage
-to the latter technique is that it is sometimes appreciably faster for
-small (number of nodes < 100) graphs. A significant disadvantage is that
-it may cycle. If <B>mode</B> is <TT>"sgd"</TT>, neato uses a version of the
-stochastic gradient descent method. The advantage of sgd is faster and more
-reliable convergence than both the previous methods, while the disadvantage
-is that it runs in a fixed number of iterations and may require larger
-values of <TT>"maxiter"</TT> in some graphs.
-<P>
-There are two experimental modes in neato, "hier", which adds a top-down
-directionality similar to the layout used in dot, and "ipsep", which
-allows the graph to specify minimum vertical and horizontal distances
-between nodes. (See the <A HREF=#d:sep>sep</A> attribute.)
-<P>
-For sfdp, the default <B>mode</B> is <TT>"spring"</TT>, which corresponds to using
-a spring-electrical model. Setting <B>mode</B> to <TT>"maxent"</TT> causes a similar
-model to be run but one that also takes into account edge lengths specified by the
-<TT>"len"</TT> attribute.
-
-<DT><A ID="d:model" HREF="#a:model"><STRONG>model</STRONG></A>
-<DD>This value specifies how the distance matrix is computed for the input
-graph. The distance matrix specifies the ideal distance between every
-pair of nodes. neato attemps to find a layout which best achieves
-these distances. By default, it uses the length of the shortest path,
-where the length of each edge is given by its <A HREF=#d:len>len</A>
-attribute. If <B>model</B> is <TT>"circuit"</TT>, neato uses the
-circuit resistance
-model to compute the distances. This tends to emphasize clusters. If
-<B>model</B> is <TT>"subset"</TT>, neato uses the subset model. This sets the
-edge length to be the number of nodes that are neighbors of exactly one
-of the end points, and then calculates the shortest paths. This helps
-to separate nodes with high degree.
-<P>
-For more control of distances, one can use <TT>model=mds</TT>. In this
-case, the <A HREF=#d:len>len</A> of an edge is used as the ideal distance
-between its vertices. A shortest path calculation is only used for
-pairs of nodes not connected by an edge. Thus, by supplying a complete
-graph, the input can specify all of the relevant distances.
-
-<DT><A ID="d:mosek" HREF="#a:mosek"><STRONG>mosek</STRONG></A>
-<DD>If Graphviz is built with MOSEK defined, mode=ipsep and mosek=true,
-the Mosek software (www.mosek.com) is use to solve the ipsep constraints.
-
-<DT><A ID="d:newrank" HREF="#a:newrank"><STRONG>newrank</STRONG></A>
-<DD>The original ranking algorithm in dot is recursive on clusters. This can produce fewer ranks
-and a more compact layout, but sometimes at the cost of a head node being place on a higher
-rank than the tail node. It also assumes that a node is not constrained in separate,
-incompatible subgraphs. For example, a node cannot be in a cluster and also be constrained by
-<TT>rank=same</TT> with a node not in the cluster.
-<P>
-If <TT>newrank=true</TT>, the ranking algorithm does a single global ranking, ignoring clusters.
-This allows nodes to be subject to multiple constraints. Rank constraints will usually take
-precedence over edge constraints.
-
-<DT><A ID="d:nodesep" HREF="#a:nodesep"><STRONG>nodesep</STRONG></A>
-<DD>In dot, this specifies the minimum space between two adjacent nodes in the same rank, in inches.
-<P>
-For other layouts, this affects the spacing between loops on a single node, or multiedges between
-a pair of nodes.
-
-<DT><A ID="d:nojustify" HREF="#a:nojustify"><STRONG>nojustify</STRONG></A>
-<DD>By default, the justification of multi-line labels is done within the
-largest context that makes sense. Thus, in the label of a polygonal
-node, a left-justified line will align with the left side of the node
-(shifted by the prescribed <A HREF=#d:margin>margin</A>).
-In record nodes, left-justified
-line will line up with the left side of the enclosing column of fields.
-If <B>nojustify</B> is <TT>"true"</TT>, multi-line labels will be justified
-in the context of itself. For example, if the attribute is set,
-the first label line is long, and the second is shorter and left-justified,
-the second will align with the left-most character in the first line,
-regardless of how large the node might be.
-
-<DT><A ID="d:normalize" HREF="#a:normalize"><STRONG>normalize</STRONG></A>
-<DD>If set, normalize coordinates of final
-layout so that the first point is at the origin, and then rotate the
-layout so that the angle of the first edge is specified by the value of <TT>normalize</TT> in degrees.
-If <TT>normalize</TT> is not a number, it is evaluated as a <TT>bool</TT>, with true
-corresponding to 0 degrees. <B>NOTE:</B> Since the attribute is evaluated first as a number,
-0 and 1 cannot be used for false and true.
-
-<DT><A ID="d:notranslate" HREF="#a:notranslate"><STRONG>notranslate</STRONG></A>
-<DD>By default, the final layout is translated so that the lower-left corner of the bounding box is
-at the origin. This can be annoying if some nodes are pinned or if the user runs <TT>neato -n</TT>.
-To avoid this translation, set <TT>notranslate</TT> to true.
-
-<DT><A ID="d:nslimit" HREF="#a:nslimit"><STRONG>nslimit</STRONG></A>
-<DD>Used to set number of iterations in
-network simplex applications. <B>nslimit</B> is used in
-computing node x coordinates.
-If defined, # iterations = <B>nslimit</B> * # nodes;
-otherwise, # iterations = MAXINT.
-
-<DT><A ID="d:nslimit1" HREF="#a:nslimit1"><STRONG>nslimit1</STRONG></A>
-<DD>Used to set number of iterations in
-network simplex applications.
-<B>nslimit1</B> is used for ranking nodes.
-If defined, # iterations = <B>nslimit1</B> * # nodes;
-otherwise, # iterations = MAXINT.
-
-<DT><A ID="d:ordering" HREF="#a:ordering"><STRONG>ordering</STRONG></A>
-<DD>If the value of the attribute is "out", then
-the outedges of a node, that is, edges with the node as its tail node,
-must appear
-left-to-right in the same order in which they are defined in
-the input.
-If the value of the attribute is "in", then
-the inedges of a node must appear
-left-to-right in the same order in which they are defined in
-the input.
-If defined as a graph or subgraph attribute, the value is applied to all nodes
-in the graph or subgraph. Note that the graph attribute takes
-precedence over the node attribute.
-
-<DT><A ID="d:orientation" HREF="#a:orientation"><STRONG>orientation</STRONG></A>
-<DD>When used on nodes: Angle, in degrees, used to rotate polygon node shapes. For any number of polygon sides, 0 degrees rotation results in a flat base.
-<P>
-When used on graphs: If <CODE>"[lL]*"</CODE>, set graph orientation to landscape.
-Used only if <A HREF=#d:rotate><B>rotate</B></A> is not defined.
-
-<DT><A ID="d:outputorder" HREF="#a:outputorder"><STRONG>outputorder</STRONG></A>
-<DD>Specify order in which nodes and edges are drawn.
-
-<DT><A ID="d:overlap" HREF="#a:overlap"><STRONG>overlap</STRONG></A>
-<DD>Determines if and how node overlaps should be removed. Nodes are first
-enlarged using the <A HREF=#d:sep><B>sep</B></A> attribute.
-If "true" , overlaps are retained.
-If the value is "scale", overlaps are removed by uniformly scaling in x and y.
-If the value converts to "false", and it is available, Prism, a proximity graph-based algorithm, is
-used to remove node overlaps.
-This can also be invoked explicitly with "overlap=prism".
-This technique starts with a
-small scaling up, controlled by the
-<A HREF="#d:overlap_scaling"><TT>overlap_scaling</TT></A> attribute,
-which can remove a significant portion of the overlap.
-The prism option also accepts an optional non-negative integer suffix.
-This can be used to control the number of attempts made at overlap
-removal. By default, <TT>overlap="prism"</TT> is equivalent to
-<TT>overlap="prism1000"</TT>. Setting <TT>overlap="prism0"</TT>
-causes only the scaling phase to be run.
-<P>
-If Prism is not available, or the version of Graphviz is earlier than 2.28, "overlap=false"
-uses a Voronoi-based technique.
-This can always be invoked explicitly with "overlap=voronoi".
-<P>
-If the value is "scalexy", x and y are separately
-scaled to remove overlaps.
-<P>
-If the value is "compress", the layout will be scaled down as much as
-possible without introducing any overlaps, obviously assuming there are
-none to begin with.
-<P>
-<B>N.B.</B>The remaining allowed values of <TT>overlap</TT>
-correspond to algorithms which, at present, can produce bad aspect ratios.
-In addition, we deprecate the use of the "ortho*" and "portho*".
-<P>
-If the value is "vpsc", overlap removal is done as a
-quadratic optimization to minimize node displacement while removing
-node overlaps.
-<P>
-If the value is "orthoxy" or "orthoyx", overlaps
-are moved by optimizing two constraint problems, one for the x axis and
-one for the y. The suffix indicates which axis is processed first.
-If the value is "ortho", the technique is similar to "orthoxy" except a
-heuristic is used to reduce the bias between the two passes.
-If the value is "ortho_yx", the technique is the same as "ortho", except
-the roles of x and y are reversed.
-The values "portho", "porthoxy", "porthoxy", and "portho_yx" are similar
-to the previous four, except only pseudo-orthogonal ordering is
-enforced.
-<P>
-If the layout is done by neato with <A HREF=#d:mode>mode</A>="ipsep",
-then one can use <TT>overlap=ipsep</TT>.
-In this case, the overlap removal constraints are
-incorporated into the layout algorithm itself.
-N.B. At present, this only supports one level of clustering.
-<P>
-Except for fdp and sfdp, the layouts assume <TT>overlap="true"</TT> as the default.
-Fdp first uses a number of passes using a built-in, force-directed technique
-to try to remove overlaps. Thus, fdp accepts <B>overlap</B> with an integer
-prefix followed by a colon, specifying the number of tries. If there is
-no prefix, no initial tries will be performed. If there is nothing following
-a colon, none of the above methods will be attempted. By default, fdp
-uses <TT>overlap="9:prism"</TT>. Note that <TT>overlap="true"</TT>,
-<TT>overlap="0:true"</TT> and <TT>overlap="0:"</TT> all turn off all overlap
-removal.
-<P>
-By default, sfdp uses <TT>overlap="prism0"</TT>.
-<P>
-Except for the Voronoi and prism methods, all of these transforms preserve the
-orthogonal ordering of the original layout. That is, if the x coordinates
-of two nodes are originally the same, they will remain the same, and if
-the x coordinate of one node is originally less than the x coordinate of
-another, this relation will still hold in the transformed layout. The
-similar properties hold for the y coordinates.
-This is not quite true for the "porth*" cases. For these, orthogonal
-ordering is only preserved among nodes related by an edge.
-
-<DT><A ID="d:overlap_scaling" HREF="#a:overlap_scaling"><STRONG>overlap_scaling</STRONG></A>
-<DD>When <TT>overlap=prism</TT>, the layout is scaled by this factor, thereby
-removing a fair amount of node overlap, and making node overlap removal
-faster and better able to retain the graph's shape.
-<P>
-If <TT>overlap_scaling</TT> is negative, the layout is scaled by
-<TT>-1*overlap_scaling</TT> times the average label size.
-If <TT>overlap_scaling</TT> is positive, the layout is scaled by
-<TT>overlap_scaling</TT>.
-If <TT>overlap_scaling</TT> is zero, no scaling is done.
-
-<DT><A ID="d:overlap_shrink" HREF="#a:overlap_shrink"><STRONG>overlap_shrink</STRONG></A>
-<DD>If true, the overlap removal algorithm will perform a compression pass to reduce the
-size of the layout.
-
-<DT><A ID="d:pack" HREF="#a:pack"><STRONG>pack</STRONG></A>
-<DD>This is true if the value of pack is "true" (case-insensitive) or a
-non-negative integer. If true, each connected component of the graph is
-laid out separately, and then the graphs are packed together.
-If pack has an integral value, this is used as the size,
-in <A HREF=#points>points</A>, of
-a margin around each part; otherwise, a default margin of 8 is used.
-If pack is interpreted as false, the entire graph is laid out together.
-The granularity and method of packing is influenced by the
-<A HREF=#d:packmode>packmode</A> attribute.
-<P>
-For layouts which always do packing, such a twopi, the <B>pack</B>
-attribute is just used to set the margin.
-
-<DT><A ID="d:packmode" HREF="#a:packmode"><STRONG>packmode</STRONG></A>
-<DD>This indicates how connected components should be packed
-(cf. <A HREF=#k:packMode>packMode</A>). Note that defining
-<B>packmode</B> will automatically turn on packing as though one had
-set <B>pack=true</B>.
-
-<DT><A ID="d:pad" HREF="#a:pad"><STRONG>pad</STRONG></A>
-<DD>The pad attribute specifies how much, in inches, to extend the
-drawing area around the minimal area needed to draw the graph.
-If the pad is a single double, both the x and y pad values are set
-equal to the given value. This area is part of the
-drawing and will be filled with the background color, if appropriate.
-<P>
-Normally, a small pad is used for aesthetic reasons, especially when
-a background color is used, to avoid having nodes and edges abutting
-the boundary of the drawn region.
-
-<DT><A ID="d:page" HREF="#a:page"><STRONG>page</STRONG></A>
-<DD>Width and height of output pages, in inches. If only a single value
-is given, this is used for both the width and height.
-<P>
-If this is set and is
-smaller than the size of the layout, a rectangular array of pages of
-the specified page size is overlaid on the layout, with origins
-aligned in the lower-left corner, thereby partitioning the layout
-into pages. The pages are then produced one at a time, in
-<A HREF=#d:pagedir>pagedir</A> order.
-<P>
-At present, this only works for PostScript output. For other types of
-output, one should use another tool to split the output into multiple
-output files. Or use the <A HREF=#d:viewport>viewport</A> to generate
-multiple files.
-
-<DT><A ID="d:pagedir" HREF="#a:pagedir"><STRONG>pagedir</STRONG></A>
-<DD>If the <A HREF=#d:page>page</A> attribute is set and applicable,
-this attribute specifies the order in which the pages are emitted.
-This is limited to one of the 8 row or column major orders.
-
-<DT><A ID="d:pencolor" HREF="#a:pencolor"><STRONG>pencolor</STRONG></A>
-<DD>Color used to draw the bounding box around a cluster.
-If <B>pencolor</B> is not defined, <A HREF=#d:color><B>color</B></A> is
-used. If this is not defined, <A HREF=#d:bgcolor>bgcolor</A> is used.
-If this is not defined, the default is used.
-<P>
-Note that a cluster inherits the root graph's attributes if defined.
-Thus, if the root graph has defined a <B>pencolor</B>, this will override a
-<B>color</B> or <B>bgcolor</B> attribute set for the cluster.
-
-<DT><A ID="d:penwidth" HREF="#a:penwidth"><STRONG>penwidth</STRONG></A>
-<DD>Specifies the width of the pen, in points, used to draw lines and curves,
-including the boundaries of edges and clusters. The value is inherited
-by subclusters.
-It has no effect on text.
-<P>
-Previous to 31 January 2008, the effect of <TT>penwidth=<I>W</I></TT>
-was achieved by including <TT>setlinewidth(<I>W</I>)</TT>
-as part of a <A HREF=#d:style><TT>style</TT></A> specification.
-If both are used, <TT>penwidth</TT> will be used.
-
-<DT><A ID="d:peripheries" HREF="#a:peripheries"><STRONG>peripheries</STRONG></A>
-<DD>Set number of peripheries used in polygonal shapes and cluster
-boundaries. Note that
-<A HREF=shapes.html#epsf>user-defined shapes</A> are treated as a
-form of box shape, so the default
-peripheries value is 1 and the user-defined shape will be drawn in
-a bounding rectangle. Setting <TT>peripheries=0</TT> will turn this off.
-Also, 1 is the maximum peripheries value for clusters.
-
-<DT><A ID="d:pin" HREF="#a:pin"><STRONG>pin</STRONG></A>
-<DD>If true and the node has a pos attribute on input, neato or fdp prevents the
-node from moving from the input position. This property can also be specified
-in the pos attribute itself (cf. the <A HREF=#k:point>point</A> type).
-<P>
-<B>Note:</B> Due to an artifact of the implementation,
-previous to 27 Feb 2014, final coordinates
-are translated to the origin. Thus, if you look at the output coordinates
-given in the (x)dot or plain format, pinned nodes will not have the same
-output coordinates as were given on input. If this is important, a
-simple workaround is to maintain the coordinates of a pinned node. The vector
-difference between the old and new coordinates will give the translation,
-which can then be subtracted from all of the appropriate coordinates.
-<P>
-After 27 Feb 2014, this translation can be avoided in neato by setting the
-<A HREF="#d:notranslate">notranslate</A> to TRUE. However, if the graph
-specifies <A HREF="#d:overlap">node overlap removal</A> or a change in
-<A HREF="#d:ratio">aspect ratio</A>, node coordinates may still change.
-
-<DT><A ID="d:pos" HREF="#a:pos"><STRONG>pos</STRONG></A>
-<DD>Position of node, or spline control points.
-For nodes, the position indicates the center of the node.
-On output, the coordinates are in <A HREF=#points>points</A>.
-<P>
-In neato and fdp, pos can be used to set the initial position of a node.
-By default, the coordinates are assumed to be in inches. However, the
-<A HREF=command.html#d:s>-s</A> command line flag can be used to specify
-different units. As the output coordinates are in points,
-feeding the output of a graph laid out by a Graphviz program into
-neato or fdp will almost always require the -s flag.
-<P>
-When the <A HREF=command.html#d:n>-n</A> command line flag is used with
-neato, it is assumed the positions have been set by one of the layout
-programs, and are therefore in points. Thus, <TT>neato -n</TT> can accept
-input correctly without requiring a <TT>-s</TT> flag and, in fact,
-ignores any such flag.
-
-<DT><A ID="d:quadtree" HREF="#a:quadtree"><STRONG>quadtree</STRONG></A>
-<DD>Quadtree scheme to use.
-<P>
-A TRUE bool value corresponds to "normal";
-a FALSE bool value corresponds to "none".
-As a slight exception to the normal interpretation of bool,
-a value of "2" corresponds to "fast".
-
-<DT><A ID="d:quantum" HREF="#a:quantum"><STRONG>quantum</STRONG></A>
-<DD>If <B>quantum</B> > 0.0, node label dimensions
-will be rounded to integral multiples of the quantum.
-
-<DT><A ID="d:rank" HREF="#a:rank"><STRONG>rank</STRONG></A>
-<DD>Rank constraints on the nodes in a subgraph.
-If <B>rank</B>="same", all nodes are placed on the same rank.
-If <B>rank</B>="min", all nodes are placed on the minimum rank.
-If <B>rank</B>="source", all nodes are placed on the minimum rank, and
-the only nodes on the minimum rank belong to some subgraph whose
-rank attribute is "source" or "min".
-Analogous criteria hold for <B>rank</B>="max" and <B>rank</B>="sink".
-(Note: the
-minimum rank is topmost or leftmost, and the maximum rank is bottommost
-or rightmost.)
-
-<DT><A ID="d:rankdir" HREF="#a:rankdir"><STRONG>rankdir</STRONG></A>
-<DD>Sets direction of graph layout. For example, if <B>rankdir</B>="LR",
-and barring cycles, an edge <CODE>T -> H;</CODE> will go
-from left to right. By default, graphs are laid out from top to bottom.
-<P>
-This attribute also has a side-effect in determining how record nodes
-are interpreted. See <A HREF="shapes.html#record">record shapes</A>.
-
-<DT><A ID="d:ranksep" HREF="#a:ranksep"><STRONG>ranksep</STRONG></A>
-<DD>In dot, this gives the desired rank separation, in inches. This is
-the minimum vertical distance between the bottom of the nodes in one
-rank and the tops of nodes in the next. If the value
-contains "equally", the centers of all ranks are spaced equally apart.
-Note that both
-settings are possible, e.g., ranksep = "1.2 equally".
-<P>
-In twopi, this attribute specifies the radial separation of concentric circles.
-For twopi, <TT>ranksep</TT> can also be a list of doubles. The first double specifies
-the radius of the inner circle; the second double specifies the increase in
-radius from the first circle to the second; etc. If there are more circles than
-numbers, the last number is used as the increment for the remainder.
-
-<DT><A ID="d:ratio" HREF="#a:ratio"><STRONG>ratio</STRONG></A>
-<DD>Sets the aspect ratio (drawing height/drawing width) for the drawing.
-Note that this is adjusted before
-the <A HREF=#d:size><B>size</B></A> attribute constraints are enforced.
-In addition, the calculations usually ignore the node sizes, so the
-final drawing size may only approximate what is desired.
-<P>
-If <B>ratio</B> is numeric, it is taken as the desired aspect ratio.
-Then, if the actual aspect ratio is less than the desired ratio,
-the drawing height is scaled up to achieve the
-desired ratio; if the actual ratio is greater than that desired ratio,
-the drawing width is scaled up.
-<P>
-If <B>ratio</B> = "fill" and the <A HREF=#d:size><B>size</B></A>
-attribute is set, node positions are scaled, separately in both x
-and y, so that the final drawing exactly fills the specified size.
-If both <A HREF=#d:size><B>size</B></A> values exceed the width
-and height of the drawing, then both coordinate values of each
-node are scaled up accordingly. However, if either size dimension
-is smaller than the corresponding dimension in the drawing, one
-dimension is scaled up so that the final drawing has the same aspect
-ratio as specified by <A HREF=#d:size><B>size</B></A>.
-Then, when rendered, the layout will be
-scaled down uniformly in both dimensions to fit the given
-<A HREF=#d:size><B>size</B></A>, which may cause nodes and text
-to shrink as well. This may not be what the user
-wants, but it avoids the hard problem of how to reposition the
-nodes in an acceptable fashion to reduce the drawing size.
-<P>
-If <B>ratio</B> = "compress" and the <A HREF=#d:size><B>size</B></A>
-attribute is set, dot attempts to compress the initial layout to fit
-in the given size. This achieves a tighter packing of nodes but
-reduces the balance and symmetry. This feature only works in dot.
-<P>
-If <B>ratio</B> = "expand", the <A HREF=#d:size><B>size</B></A>
-attribute is set, and both the width and the height of the graph are
-less than the value in <A HREF=#d:size><B>size</B></A>, node positions are scaled
-uniformly until at least
-one dimension fits <A HREF=#d:size><B>size</B></A> exactly.
-Note that this is distinct from using <A HREF=#d:size><B>size</B></A> as the
-desired size, as here the drawing is expanded before edges are generated and
-all node and text sizes remain unchanged.
-<P>
-If <B>ratio</B> = "auto", the <A HREF=#d:page><B>page</B></A>
-attribute is set and the graph cannot be drawn on a single page,
-then <A HREF=#d:size><B>size</B></A> is set to an ``ideal'' value.
-In particular, the size in a given dimension will be the smallest integral
-multiple of the page size in that dimension which is at least half the
-current size. The two dimensions are then scaled independently to the
-new size. This feature only works in dot.
-
-<DT><A ID="d:rects" HREF="#a:rects"><STRONG>rects</STRONG></A>
-<DD>Rectangles for fields of records, <A HREF=#points>in points</A>.
-
-<DT><A ID="d:regular" HREF="#a:regular"><STRONG>regular</STRONG></A>
-<DD>If true, force polygon to be regular, i.e., the vertices of the
-polygon will lie on a circle whose center is the center of the node.
-
-<DT><A ID="d:remincross" HREF="#a:remincross"><STRONG>remincross</STRONG></A>
-<DD>If true and there are multiple clusters, run crossing
-minimization a second time.
-
-<DT><A ID="d:repulsiveforce" HREF="#a:repulsiveforce"><STRONG>repulsiveforce</STRONG></A>
-<DD>The power of the repulsive force used in an extended Fruchterman-Reingold
-force directed model. Values larger than 1 tend to reduce
-the warping effect at the expense of less clustering.
-
-<DT><A ID="d:resolution" HREF="#a:resolution"><STRONG>resolution</STRONG></A>
-<DD>This is a synonym for the <A HREF=#d:dpi>dpi</A> attribute.
-
-<DT><A ID="d:root" HREF="#a:root"><STRONG>root</STRONG></A>
-<DD>This specifies nodes to be used as the center of the
-layout and the root of the generated spanning tree. As a graph attribute,
-this gives the name of the node. As a node attribute, it
-specifies that the node should be used as a central node. In twopi,
-this will actually be the central node. In circo, the block containing
-the node will be central in the drawing of its connected component.
-If not defined,
-twopi will pick a most central node, and circo will pick a random node.
-<P>
-If the root attribute is defined as the empty string, twopi will reset it
-to name of the node picked as the root node.
-<P>
-For twopi, it is possible to have multiple roots, presumably one for each
-component. If more than one node in a component is marked as the root, twopi
-will pick one.
-
-<DT><A ID="d:rotate" HREF="#a:rotate"><STRONG>rotate</STRONG></A>
-<DD>If 90, set drawing orientation to landscape.
-
-<DT><A ID="d:rotation" HREF="#a:rotation"><STRONG>rotation</STRONG></A>
-<DD>Causes the final layout to be rotated counter-clockwise by the specified number of degrees.
-
-<DT><A ID="d:samehead" HREF="#a:samehead"><STRONG>samehead</STRONG></A>
-<DD>Edges with the same head and the same <B>samehead</B> value are aimed
-at the same point on the head. This has no effect on loops.
-Each node can have at most 5 unique samehead values.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:sametail" HREF="#a:sametail"><STRONG>sametail</STRONG></A>
-<DD>Edges with the same tail and the same <B>sametail</B> value are aimed
-at the same point on the tail. This has no effect on loops.
-Each node can have at most 5 unique sametail values.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:samplepoints" HREF="#a:samplepoints"><STRONG>samplepoints</STRONG></A>
-<DD>If the input graph defines the <A HREF=#d:vertices><B>vertices</B></A>
-attribute, and output is dot or xdot, this gives
-the number of points used for a node whose shape is a circle or ellipse.
-It plays the same role in neato, when adjusting the layout to avoid
-overlapping nodes, and in image maps.
-
-<DT><A ID="d:scale" HREF="#a:scale"><STRONG>scale</STRONG></A>
-<DD>If set, after the initial layout, the layout is scaled by the given factors.
-If only a single number is given, this is used for both factors.
-
-<DT><A ID="d:searchsize" HREF="#a:searchsize"><STRONG>searchsize</STRONG></A>
-<DD>During network simplex, maximum number of edges with negative cut values
-to search when looking for one with minimum cut value.
-
-<DT><A ID="d:sep" HREF="#a:sep"><STRONG>sep</STRONG></A>
-<DD>Specifies margin to leave around nodes when removing node overlap.
-This guarantees a minimal non-zero distance between nodes.
-<P>
-If the attribute begins with a plus sign '+', an additive margin is
-specified. That is, "+w,h" causes the node's bounding box to be increased
-by w
-points on the left and right sides, and by h points on the top and bottom.
-Without a plus sign, the node is scaled by 1 + w in the x coordinate
-and 1 + h in the y coordinate.
-<P>
-If only a single number is given, this is used for both dimensions.
-<P>
-If unset but <A HREF=#d:esep>esep</A> is defined, the <tt>sep</tt> values
-will be set to the <tt>esep</tt> values divided by <tt>0.8</tt>.
-If <tt>esep</tt> is unset, the default value is used.
-
-<DT><A ID="d:shape" HREF="#a:shape"><STRONG>shape</STRONG></A>
-<DD>Set the shape of a node.
-
-<DT><A ID="d:shapefile" HREF="#a:shapefile"><STRONG>shapefile</STRONG></A>
-<DD>(Deprecated) If defined, shapefile specifies a file containing user-supplied node content.
-The <A HREF=#d:shape><B>shape</B></A> of the node is set to box.
-The image in the shapefile must be
-rectangular. The image formats supported as well as the precise semantics of
-how the file is used depends on the
-<A HREF="output.html">output format</A>. For further details, see
-<A HREF=output.html#d:image_fmts>Image Formats</A> and
-<A HREF="../../../faq/#ext_image">External PostScript files</A>.
-<P>
-There is one exception to this usage.
-If <B>shape</B> is set to "epsf", shapefile gives
-a filename containing a definition of the node in PostScript.
-The graphics defined must be contain all of the
-node content, including any desired boundaries.
-For further details, see
-<A HREF="../../../faq/#ext_ps_file">
-External PostScript files</A>.
-
-<DT><A ID="d:showboxes" HREF="#a:showboxes"><STRONG>showboxes</STRONG></A>
-<DD>Print guide boxes in PostScript at the beginning of
-routesplines if 1, or at the end if 2. (Debugging, TB mode only!)
-
-<DT><A ID="d:sides" HREF="#a:sides"><STRONG>sides</STRONG></A>
-<DD>Number of sides if <A HREF=#d:shape><B>shape</B></A>=polygon.
-
-<DT><A ID="d:size" HREF="#a:size"><STRONG>size</STRONG></A>
-<DD>Maximum width and height of drawing, in inches.
-If only a single number is given, this is used for both the width
-and the height.
-<P>
-If defined and the drawing is larger than the given size,
-the drawing is uniformly
-scaled down so that it fits within the given size.
-<P>
-If <TT>size</TT> ends in an exclamation point (<TT>!</TT>),
-then it is taken to be
-the desired size. In this case, if both dimensions of the drawing are
-less than <TT>size</TT>, the drawing is scaled up uniformly until at
-least one dimension equals its dimension in <TT>size</TT>.
-<P>
-Note that there is some interaction between the <B>size</B> and
-<A HREF=#d:ratio><B>ratio</B></A> attributes.
-
-<DT><A ID="d:skew" HREF="#a:skew"><STRONG>skew</STRONG></A>
-<DD>Skew factor for <A HREF=#d:shape><B>shape</B></A>=polygon. Positive values
-skew top of polygon to right; negative to left.
-
-<DT><A ID="d:smoothing" HREF="#a:smoothing"><STRONG>smoothing</STRONG></A>
-<DD>Specifies a post-processing step used to smooth out an uneven distribution
-of nodes.
-
-<DT><A ID="d:sortv" HREF="#a:sortv"><STRONG>sortv</STRONG></A>
-<DD>If <A HREF="#d:packmode">packmode</A> indicates an array packing,
-this attribute specifies an
-insertion order among the components, with smaller values inserted first.
-
-<DT><A ID="d:splines" HREF="#a:splines"><STRONG>splines</STRONG></A>
-<DD>Controls how, and if, edges are represented. If true, edges are drawn as
-splines routed around nodes; if false, edges are drawn as line segments.
-If set to <tt>none</tt> or "", no edges are drawn at all.
-<P>
-(1 March 2007) The values <TT>line</TT> and <TT>spline</TT> can be
-used as synonyms for <TT>false</TT> and <TT>true</TT>, respectively.
-In addition, the value <TT>polyline</TT> specifies that edges should be
-drawn as polylines.
-<P>
-(28 Sep 2010) The value <TT>ortho</TT> specifies edges should be
-routed as polylines of axis-aligned segments. Currently, the routing
-does not handle ports or, in dot, edge labels.
-<P>
-(25 Sep 2012) The value <TT>curved</TT> specifies edges should be
-drawn as curved arcs.
-<P>
-<TABLE>
-<TR>
- <TD><IMG WIDTH="200" VSPACE="10" HSPACE="10" SRC="spline_none.png">
- <TD><IMG WIDTH="200" VSPACE="10" HSPACE="10" SRC="spline_line.png">
-</TR>
-<TR>
- <TD ALIGN="center">splines=none<BR>splines=""
- <TD ALIGN="center">splines=line<BR>splines=false
-</TR>
-<TR>
- <TD><IMG WIDTH="200" VSPACE="10" HSPACE="10" SRC="spline_polyline.png">
- <TD><IMG WIDTH="200" VSPACE="10" HSPACE="10" SRC="spline_curved.png">
-</TR>
-<TR>
- <TD ALIGN="center">splines=polyline
- <TD ALIGN="center">splines=curved
-</TR>
-<TR>
- <TD><IMG WIDTH="200" VSPACE="10" HSPACE="10" SRC="spline_ortho.png">
- <TD><IMG WIDTH="200" VSPACE="10" HSPACE="10" SRC="spline_spline.png">
-</TR>
-<TR>
- <TD ALIGN="center">splines=ortho
- <TD ALIGN="center">splines=spline<BR>splines=true
-</TR>
-</TABLE>
-
-<P>
-By default, the attribute is unset. How this is interpreted depends on
-the layout. For dot, the default is to draw edges as splines. For all
-other layouts, the default is to draw edges as line segments. Note that
-for these latter layouts, if <TT>splines="true"</TT>, this
-requires non-overlapping nodes (cf. <A HREF=#d:overlap><B>overlap</B></A>).
-If fdp is used for layout and <TT>splines="compound"</TT>, then the edges are
-drawn to avoid clusters as well as nodes.
-
-<DT><A ID="d:start" HREF="#a:start"><STRONG>start</STRONG></A>
-<DD>Parameter used to determine the initial layout of nodes. If unset, the
-nodes are randomly placed in a unit square with
-the same seed is always used for the random number generator, so the
-initial placement is repeatable.
-
-<DT><A ID="d:style" HREF="#a:style"><STRONG>style</STRONG></A>
-<DD>Set style information for components of the graph. For cluster subgraphs, if <TT>style="filled"</TT>, the
-cluster box's background is filled.
-<P>
-If the default style attribute has been set for a component, an individual component can use
-<TT>style=""</TT> to revert to the normal default. For example, if the graph has
-<P>
-<TT>edge [style="invis"]</TT>
-<P>
-making all edges invisible, a specific edge can overrride this via:
-<P>
-<TT>a -> b [style=""]</TT>
-<P>
-Of course, the component can also explicitly set its <TT>style</TT> attribute to the desired value.
-
-<DT><A ID="d:stylesheet" HREF="#a:stylesheet"><STRONG>stylesheet</STRONG></A>
-<DD>A URL or pathname specifying an XML style sheet, used in SVG output. Combine
-with <a href="#d:class">class</a> to style elements using CSS selectors.
-
-<DT><A ID="d:tailURL" HREF="#a:tailURL"><STRONG>tailURL</STRONG></A>
-<DD>If <B>tailURL</B> is defined, it is
-output as part of the tail label of the edge.
-Also, this value is used near the tail node, overriding any
-<A HREF=#d:URL>URL</A> value.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:tail_lp" HREF="#a:tail_lp"><STRONG>tail_lp</STRONG></A>
-<DD>Position of an edge's tail label, <A HREF=#points>in points</A>.
-The position indicates the center of the label.
-
-<DT><A ID="d:tailclip" HREF="#a:tailclip"><STRONG>tailclip</STRONG></A>
-<DD>If true, the tail of an edge is clipped to the boundary of the tail node;
-otherwise, the end of the edge goes to the center of the node, or the
-center of a port, if applicable.
-
-<DT><A ID="d:tailhref" HREF="#a:tailhref"><STRONG>tailhref</STRONG></A>
-<DD>Synonym for <A HREF=#d:tailURL>tailURL</A>.
-
-<DT><A ID="d:taillabel" HREF="#a:taillabel"><STRONG>taillabel</STRONG></A>
-<DD>Text label to be placed near tail of edge.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:tailport" HREF="#a:tailport"><STRONG>tailport</STRONG></A>
-<DD>Indicates where on the tail node to attach the tail of the edge.
-See <A HREF=#h:undir_note>limitation</A>.
-
-<DT><A ID="d:tailtarget" HREF="#a:tailtarget"><STRONG>tailtarget</STRONG></A>
-<DD>If the edge has a <A HREF=#d:tailURL>tailURL</A>,
-this attribute determines which window of the
-browser is used
-for the URL. Setting it to "_graphviz" will open a new window if it
-doesn't already exist, or reuse it if it does.
-If undefined, the value of the <A HREF=#d:target>target</A> is used.
-
-<DT><A ID="d:tailtooltip" HREF="#a:tailtooltip"><STRONG>tailtooltip</STRONG></A>
-<DD>Tooltip annotation attached to the tail of an edge. This is used only
-if the edge has a <A HREF=#d:tailURL>tailURL</A> attribute.
-
-<DT><A ID="d:target" HREF="#a:target"><STRONG>target</STRONG></A>
-<DD>If the object has a URL, this attribute determines which window
-of the browser is used for the URL.
-See <A HREF="http://www.w3.org/TR/html401/present/frames.html#adef-target">W3C documentation</A>.
-
-<DT><A ID="d:tooltip" HREF="#a:tooltip"><STRONG>tooltip</STRONG></A>
-<DD>Tooltip annotation attached to the node or edge. If unset, Graphviz
-will use the object's <A HREF=#d:label>label</A> if defined.
-Note that if the label is a record specification or an HTML-like
-label, the resulting tooltip may be unhelpful. In this case, if
-tooltips will be generated, the user should set a <TT>tooltip</TT>
-attribute explicitly.
-
-<DT><A ID="d:truecolor" HREF="#a:truecolor"><STRONG>truecolor</STRONG></A>
-<DD>If set explicitly to true or false, the value determines whether or not
-internal bitmap rendering relies on a truecolor color model or uses
-a color palette.
-If the attribute is unset, truecolor is not used
-unless there is a <A HREF=#d:shapefile>shapefile</A> property
-for some node in the graph.
-The output model will use the input model when possible.
-<P>
-Use of color palettes results in less memory usage during creation of the
-bitmaps and smaller output files.
-<P>
-Usually, the only time it is necessary to specify the truecolor model
-is if the graph uses more than 256 colors.
-However, if one uses <A HREF=#d:bgcolor>bgcolor</A>=transparent with
-a color palette, font
-antialiasing can show up as a fuzzy white area around characters.
-Using <B>truecolor</B>=true avoids this problem.
-
-<DT><A ID="d:vertices" HREF="#a:vertices"><STRONG>vertices</STRONG></A>
-<DD>If the input graph defines this attribute, the node is polygonal,
-and output is dot or xdot, this attribute provides the
-coordinates of the vertices of the node's polygon, in inches.
-If the node is an ellipse or circle, the
-<A HREF=#d:samplepoints>samplepoints</A> attribute affects
-the output.
-
-<DT><A ID="d:viewport" HREF="#a:viewport"><STRONG>viewport</STRONG></A>
-<DD>Clipping window on final drawing. Note that this attribute supersedes any
-<A HREF="#d:size">size</A> attribute. The width and height of the viewport specify
-precisely the final size of the output.
-
-<DT><A ID="d:voro_margin" HREF="#a:voro_margin"><STRONG>voro_margin</STRONG></A>
-<DD>Factor to scale up drawing to allow margin for expansion in
-Voronoi technique. dim' = (1+2*margin)*dim.
-
-<DT><A ID="d:weight" HREF="#a:weight"><STRONG>weight</STRONG></A>
-<DD>Weight of edge. In dot, the heavier the weight, the shorter,
-straighter and more vertical the edge is.
-<B>N.B.</B> Weights in dot must be integers.
-For twopi, a weight of 0 indicates the edge should not be used in constructing a
-spanning tree from the root.
-For other layouts, a larger weight encourages the layout to
-make the edge length closer to that specified by the
-<A HREF=#d:len>len</A> attribute.
-
-<DT><A ID="d:width" HREF="#a:width"><STRONG>width</STRONG></A>
-<DD>Width of node, in inches. This is taken as the initial, minimum width
-of the node. If <A HREF=#d:fixedsize><B>fixedsize</B></A> is true, this
-will be the final width of the node. Otherwise, if the node label
-requires more width to fit, the node's width will be increased to
-contain the label. Note also that, if the output format is dot, the
-value given to <B>width</B> will be the final value.
-<P>
-If the node shape is regular, the width and height are made identical.
-In this case, if either the width or the height is set explicitly,
-that value is used.
-In this case, if both the width or the height are set explicitly,
-the maximum of the two values is used.
-If neither is set explicitly, the minimum of the two default values
-is used.
-
-<DT><A ID="d:xdotversion" HREF="#a:xdotversion"><STRONG>xdotversion</STRONG></A>
-<DD>For xdot output, if this attribute is set, this determines the version of xdot used in output.
-If not set, the attribute will be set to the xdot version used for output.
-
-<DT><A ID="d:xlabel" HREF="#a:xlabel"><STRONG>xlabel</STRONG></A>
-<DD>External label for a node or edge. For nodes, the label will be placed outside of the
-node but near it. For edges, the label will be placed near the center of the edge.
-This can be useful in dot to avoid the occasional problem when the use of edge labels
-distorts the layout. For other layouts, the xlabel attribute can be viewed as a synonym
-for the <A HREF=#d:label><B>label</B></A> attribute.
-<P>
-These labels are added after all nodes and edges have been placed. The labels will be placed
-so that they do not overlap any node or label. This means it may not be possible to place all
-of them. To force placing all of them, use the <A HREF=#d:forcelabels><B>forcelabels</B></A> attribute.
-
-<DT><A ID="d:xlp" HREF="#a:xlp"><STRONG>xlp</STRONG></A>
-<DD>Position of an exterior label, <A HREF=#points>in points</A>.
-The position indicates the center of the label.
-
-<DT><A ID="d:z" HREF="#a:z"><STRONG>z</STRONG></A>
-<DD><B>Deprecated:</B>Use <A HREF=#d:pos><B>pos</B></A> attribute, along
-with <A HREF=#d:dimen><B>dimen</B></A> and/or <A HREF=#d:dim><B>dim</B></A>
-to specify dimensions.
-<P>
-Provides z coordinate value for 3D layouts and displays. If the
-graph has <A HREF=#d:dim><B>dim</B></A> set to 3 (or more),
-neato will use a node's <B>z</B> value
-for the z coordinate of its initial position if
-its <A HREF=#d:pos><B>pos</B></A> attribute is also defined.
-<P>
-Even if no <B>z</B> values are specified in the input, it is necessary to
-declare a <B>z</B> attribute for nodes, e.g, using <TT>node[z=""]</TT>
-in order to get z values on output.
-Thus, setting <TT>dim=3</TT> but not declaring <B>z</B> will
-cause <TT>neato -Tvrml</TT> to
-layout the graph in 3D but project the layout onto the xy-plane
-for the rendering. If the <B>z</B> attribute is declared, the final rendering
-will be in 3D.
-
-</DL>
-<HR>
-<H1>Attribute Type Descriptions</H1>
-The following list gives the legal strings corresponding to values of
-the given types.
-The syntax for describing legal type strings is a mixture of literal strings,
-stdio encodings (e.g., <CODE>%f</CODE> for a double), and regular expressions.
-For regular expressions, <CODE>(...)*</CODE> indicates 0 or more copies of the expression
-enclosed in the parentheses, <CODE>(...)+</CODE> indicates 1 or more, and
-<CODE>(...)?</CODE> denotes 0 or 1 copy.
-<DL>
-<DT ID="k:addDouble"><STRONG>addDouble</STRONG>
-<DD><P>A double with an optional prefix '+'.
-
-<DT ID="k:addPoint"><STRONG>addPoint</STRONG>
-<DD><P>A <A HREF="#k:point">point</A> with an optional prefix '+'.
-
-<DT ID="k:arrowType"><STRONG>arrowType</STRONG>
-<DD><TABLE>
- <TR><TD>"normal"<TD><IMG SRC="a_normal.gif">
- <TD>"inv"<TD><IMG SRC="a_inv.gif"></TR>
- <TR><TD>"dot"<TD><IMG SRC="a_dot.gif">
- <TD>"invdot"<TD><IMG SRC="a_invdot.gif"></TR>
- <TR><TD>"odot"<TD><IMG SRC="a_odot.gif">
- <TD>"invodot"<TD><IMG SRC="a_invodot.gif"></TR>
- <TR><TD>"none"<TD><IMG SRC="a_none.gif">
- <TD>"tee"<TD><IMG SRC="a_tee.gif"></TR>
- <TR><TD>"empty"<TD><IMG SRC="a_empty.gif">
- <TD>"invempty"<TD><IMG SRC="a_invempty.gif"></TR>
- <TR><TD>"diamond"<TD><IMG SRC="a_diamond.gif">
- <TD>"odiamond"<TD><IMG SRC="a_odiamond.gif"></TR>
- <TR><TD>"ediamond"<TD><IMG SRC="a_ediamond.gif">
- <TD>"crow"<TD><IMG SRC="a_crow.gif"></TR>
- <TR><TD>"box"<TD><IMG SRC="a_box.gif">
- <TD>"obox"<TD><IMG SRC="a_obox.gif"></TR>
- <TR><TD>"open"<TD><IMG SRC="a_open.gif">
- <TD>"halfopen"<TD><IMG SRC="a_halfopen.gif"></TR>
- <TR><TD>"vee"<TD><IMG SRC="a_open.gif">
-</TABLE>
-<P>
-The examples above show a set of commonly used arrow shapes.
-There is a grammar of <A HREF=arrows.html>arrow shapes</A>
-which can be used to describe a collection of 3,111,696 arrow combinations of the
-42 variations of the primitive set of 11 arrows. The basic arrows shown
-above contain most of the primitive shapes
-(<TT>box</TT>, <TT>crow</TT>, <TT>diamond</TT>,
-<TT>dot</TT>, <TT>inv</TT>, <TT>none</tt>,
-<TT>normal</tt>, <TT>tee</TT>, <TT>vee</TT>)
-plus ones that can be derived from the grammar
-(<TT>odot</TT>, <TT>invdot</TT>, <TT>invodot</TT>,
-<TT>obox</TT>, <TT>odiamond</TT>)
-plus some supported as special cases for backward-compatibility
-(<TT>ediamond</TT>, <TT>open</TT>, <TT>halfopen</TT>,
-<TT>empty</TT>, <TT>invempty</TT>).
-
-<DT ID="k:clusterMode"><STRONG>clusterMode</STRONG>
-<DD>"local","global","none"
-
-<DT ID="k:color"><STRONG>color</STRONG>
-<DD>Colors can be specified using one of four formats.
- <TABLE><TR><TD>"#%2x%2x%2x"<TD>Red-Green-Blue (RGB)</TR>
- <TR><TD>"#%2x%2x%2x%2x"<TD>Red-Green-Blue-Alpha (RGBA)</TR>
- <TR><TD>"H[, ]+S[, ]+V"<TD>Hue-Saturation-Value (HSV) 0.0 <= H,S,V <= 1.0</TR>
- <TR><TD>string<TD><A HREF=colors.html>color name</A></TR></TABLE>
- The specification for the RGB and RGBA formats are the format strings used by
- <TT>sscanf</TT> to scan the color value. Thus, these values have the form
- "#RGB" or "#RGBA", where R, G, B, and A each consist of 2 hexadecimal
- digits, and can be separated by whitespace. HSV colors have the form of 3
- numbers between 0 and 1, separated by whitespace or commas.
-<P>
-String-valued color specifications are case-insensitive and interpreted
-in the context of the current color scheme, as specified by the
-<A HREF=#d:colorscheme>colorscheme</A> attribute. If this is undefined,
-the X11 naming scheme will be used.
-An initial <TT>"/"</TT> character can be used to override the use of
-the <TT>colorscheme</TT> attribute. In particular, a single initial
-<TT>"/"</TT> will cause the string to be evaluated using the default
-X11 naming. If the color value has the form <TT>"/ssss/yyyy"</TT>,
-the name <TT>yyyy</TT> is interpreted using the schema <TT>ssss</TT>.
-If the color scheme name is empty, i.e., the color has the
-form <TT>"//yyyy"</TT>, the <TT>colorscheme</TT> attribute is used.
-Thus, the forms <TT>"yyyy"</TT> and <TT>"//yyyy"</TT> are
-equivalent.
-<P>At present, Graphviz recognizes the default color scheme <TT>X11</TT>,
-and the <A HREF="colors.html#brewer">Brewer color schemes</A> (cf. <A HREF="http://www.personal.psu.edu/faculty/c/a/cab38/ColorBrewer/ColorBrewer_intro.html">ColorBrewer</A>). Please note that Brewer
-color schemes are covered by this <A HREF=colors.html#brewer_license>license</A>.
-<P>
-Examples:<BR>
- <TABLE border=1>
- <TR><TH>Color<TH>RGB<TH>HSV<TH>String</TR>
- <TR><TD align=center bgcolor=#ffffff>White<TD>"#ffffff"<TD>"0.000 0.000 1.000"<TD>"white"</TR>
- <TR><TD align=center bgcolor=#000000><font color=white>Black</font><TD>"#000000"<TD>"0.000 0.000 0.000"<TD>"black"</TR>
- <TR><TD align=center bgcolor=#ff0000>Red<TD>"#ff0000"<TD>"0.000 1.000 1.000"<TD>"red"</TR>
- <TR><TD align=center bgcolor=#40e0d0>Turquoise<TD>"#40e0d0"<TD>"0.482 0.714 0.878"<TD>"turquoise"</TR>
- <TR><TD align=center bgcolor=#a0522d>Sienna<TD>"#a0522d"<TD>"0.051 0.718 0.627"<TD>"sienna"</TR>
- </TABLE>
-<P>
- The string value <TT>transparent</TT> can be used to indicate no color.
- This is only available in the output formats
- ps, svg, fig, vmrl, and the bitmap formats. It can be used whenever a
- color is needed but is most useful with
- the <A HREF=#d:bgcolor>bgcolor</A> attribute.
- Usually, the same effect can be achieved by setting
- <A HREF=#d:style>style</A> to <TT>invis</TT>.
-
-<DT ID="k:colorList"><STRONG>colorList</STRONG>
-<DD>A colon-separated list of weighted color values: <I>WC</I>(:<I>WC</I>)*
-where each <I>WC</I> has the form <I>C(;F)?</I> with C a <A HREF=#k:color>color</A> value
-and the optional <I>F</I> a floating-point number, 0 ≤ <I>F</I> ≤ 1. The sum of the
-floating-point numbers in a <TT>colorList</TT> must sum to at most 1.
-<P>
-<b>NOTE:</b> Gradient fills, described below, are currently only available via CAIRO or SVG rendering.
-<P>
-If the colorList value specifies multiple colors, with no weights, and a filled style is specified,
-a linear gradient fill is done using the first two colors.
-If weights are present, a degenerate linear gradient fill is done. This essentially does a fill using
-two colors, with the weights specifying how much of region is filled with each color.
-If the <A HREF=#a:style>style</A> attribute contains the value <tt>radial</tt>, then
-a radial gradient fill is done. These fills work with any shape.
-<P>
-For certain shapes, the <A HREF=#a:style>style</A> attribute can be set
-to do fills using more than 2 colors. See the <A HREF=#k:style>style</A> type for more information.
-<P>
-The following table shows some variations of the <TT>yellow:blue</TT> color list depending on the
-<A HREF=#a:style>style</A> and <A HREF=#a:gradientangle>gradientangle</A> attributes.
- <TABLE border=1>
- <TR><TH>Gradient angle<TH><tt>style=filled</tt><TH><tt>style=filled<br>fillcolor=yellow;0.3:blue</tt><TH><tt>style=radial</tt></TR>
- <TR><TD align=center>0<TD><IMG SRC="g_lin0.png"><TD ALIGN="CENTER"><IMG SRC="g_wlin0.png"><TD><IMG SRC="g_rad0.png"></TR>
- <TR><TD align=center>45<TD><IMG SRC="g_lin45.png"><TD ALIGN="CENTER"><IMG SRC="g_wlin45.png"><TD><IMG SRC="g_rad45.png"></TR>
- <TR><TD align=center>90<TD><IMG SRC="g_lin90.png"><TD ALIGN="CENTER"><IMG SRC="g_wlin90.png"><TD><IMG SRC="g_rad90.png"></TR>
- <TR><TD align=center>180<TD><IMG SRC="g_lin180.png"><TD ALIGN="CENTER"><IMG SRC="g_wlin180.png"><TD><IMG SRC="g_rad180.png"></TR>
- <TR><TD align=center>270<TD><IMG SRC="g_lin270.png"><TD ALIGN="CENTER"><IMG SRC="g_wlin270.png"><TD><IMG SRC="g_rad270.png"></TR>
- <TR><TD align=center>360<TD><IMG SRC="g_lin360.png"><TD ALIGN="CENTER"><IMG SRC="g_wlin360.png"><TD><IMG SRC="g_rad360.png"></TR>
- </TABLE>
-
-<DT ID="k:dirType"><STRONG>dirType</STRONG>
-<DD>For an edge <CODE>T -> H;</CODE>
- <TABLE>
- <TR><TD>"forward"<TD><IMG SRC="forward.gif">
- <TD>"back"<TD><IMG SRC="back.gif"></TR>
- <TR><TD>"both"<TD><IMG SRC="both.gif">
- <TD>"none"<TD><IMG SRC="nohead.gif"></TR>
- </TABLE>
-That is, a glyph is drawn at the head end of an edge if and only
-if dirType is "forward" or "both";
-a glyph is drawn at the tail end of an edge if and only
-if dirType is "back" or "both";
-<P>
-For undirected edges <CODE>T -- H;</CODE>, one of the nodes, usually
-the righthand one, is treated as the head for the purpose of
-interpreting "forward" and "back".
-
-<DT ID="k:double"><STRONG>double</STRONG>
-<DD>Double-precision floating point number.
-
-<DT ID="k:doubleList"><STRONG>doubleList</STRONG>
-<DD>A colon-separated list of doubles: "<I>%f</I>(:<I>%f</I>)*"
- where each <I>%f</I> is a double.
-
-<DT ID="k:escString"><STRONG>escString</STRONG>
-<DD>A string allowing escape sequences which are replaced according
-to the context.
-For node attributes, the substring "\N" is replaced by the name of the node,
-and the substring "\G" by the name of the graph.
-For graph or cluster attributes, the substring "\G" is replaced by the
-name of the graph or cluster.
-For edge attributes, the substring "\E" is replaced by the name of the edge,
-the substring "\G" is replaced by the name of the graph or cluster,
-and the substrings "\T" and "\H" by the names of
-the tail and head nodes, respectively.
-The name of an edge is the string formed from the name of the
-tail node, the appropriate edge operator ("--" or "->") and the name of the
-head node.
-In all cases, the substring "\L" is replaced by the object's label attribute.
-<P>
-In addition, if the associated attribute is
-<A HREF=#a:label>label</A>,
-<A HREF=#a:headlabel>headlabel</A> or <A HREF=#a:taillabel>taillabel</A>,
-the escape sequences "\n", "\l" and "\r"
-divide the label into lines, centered, left-justified, and right-justified,
-respectively.
-<P>
-Obviously, one can use "\\" to get a single backslash. A backslash appearing before any
-character not listed above is ignored.
-
-<DT ID="k:int"><STRONG>int</STRONG>
-<DD>Integer number.
-
-<DT ID="k:layerList"><STRONG>layerList</STRONG>
-<DD>list of strings separated by characters from the
-<A HREF=#a:layersep>layersep</A> attribute (by default, colons,
-tabs or spaces), defining <A HREF=#a:layer>layer</A>
-names and implicitly numbered 1,2,...
-
-<DT ID="k:layerRange"><STRONG>layerRange</STRONG>
-<DD>specifies a list of layers defined by the <A HREF=#a:layers>layers</A> attribute.
-It consists of a list of layer intervals separated by any collection of characters from
-the <A HREF=#a:layerlistsep>layerlistsep</A> attribute.
-Each layer interval is specified as either a
-layerId or a layerId<B>s</B>layerId<BR>, where layerId = "all",
-a decimal integer or a <A HREF=#a:layer>layer</A> name.
-(An integer i corresponds to layer i, layers being numbered from 1.)
-The string <B>s</B> consists of 1 or more separator characters specified
-by the <A HREF=#a:layersep>layersep</A> attribute.
-<P>
-Thus, assuming the default values for <A HREF=#a:layersep>layersep</A>
-and <A HREF=#a:layerlistsep>layerlistsep</A>, if <TT>layers="a:b:c:d:e:f:g:h"</TT>, the
-layerRange string <TT>layers="a:b,d,f:all"</TT> would denote the layers
-<TT>a b d f g h"</TT>.
-
-<DT ID="k:lblString"><STRONG>lblString</STRONG>
-<DD>an <A HREF=#k:escString>escString</A>
-or an <A HREF=shapes.html#html>HTML label</A>.
-
-<DT ID="k:outputMode"><STRONG>outputMode</STRONG>
-<DD>"breadthfirst","nodesfirst","edgesfirst"
-These specify the order in which nodes and edges are drawn in concrete
-output. The default "breadthfirst" is the simplest, but when the graph
-layout does not avoid edge-node overlap, this mode will sometimes have
-edges drawn over nodes and sometimes on top of nodes. If the mode
-"nodesfirst" is chosen, all nodes are drawn first, followed by the
-edges. This guarantees an edge-node overlap will not be mistaken for
-an edge ending at a node. On the other hand, usually for aesthetic
-reasons, it may be desirable that all edges appear beneath nodes, even
-if the resulting drawing is ambiguous. This can be achieved by choosing
-"edgesfirst".
-
-<DT ID="k:packMode"><STRONG>packMode</STRONG>
-<DD>"node", "clust" , "graph" , "array(_<I>flags</I>)?(%d)?"
-<P>
-The modes "node", "clust" or "graph"
-specify that the components should be packed together tightly, using
-the specified granularity.
-A value of "node" causes
-packing at the node and edge level, with no overlapping of these objects.
-This produces a layout with the least area, but it also allows interleaving,
-where a node of one component may lie between two nodes in another
-component. A value of "graph" does a packing using the bounding box of the
-component. Thus, there will be a rectangular region around a component
-free of elements of any other component.
-A value of "clust" guarantees that top-level clusters are kept intact.
-What effect a value has also depends on the layout algorithm. For
-example, neato does not support clusters, so a value of "clust" will
-have the same effect as the default "node" value.
-<P>
-The mode "array(_<I>flag</I>)?(%d)?"
-indicates that the components should be packed at the
-graph level into an array of graphs. By default, the components
-are in row-major order, with the number of columns roughly the
-square root of the number of components. If the optional flags
-contains 'c', then column-major order is used. Finally, if the
-optional integer suffix is used, this specifies the number of
-columns for row-major or the number of rows for column-major.
-Thus, the mode "array_c4" indicates array packing, with 4 rows,
-starting in the upper left and going down the first column, then
-down the second column, etc., until all components are used.
-<P>
-If a graph is smaller than the array cell it occupies, it is centered by default.
-The optional flags may contain 't', 'b', 'l', or 'r', indicating that the graphs
-should be aligned along the top, bottom, left or right, respectively.
-<P>
-If the optional flags contains 'u', this causes the insertion
-order of elements in the array to be determined by user-supplied
-values. Each component can specify its sort value by a
-non-negative integer using the <A HREF="#d:sortv">sortv</A> attribute.
-Components are
-inserted in order, starting with the one with the smallest
-sort value. If no sort value is specified, zero is used.
-
-<DT ID="k:pagedir"><STRONG>pagedir</STRONG>
-<DD>"BL", "BR", "TL", "TR", "RB", "RT", "LB", "LT".
-These specify the 8 row or column major orders for traversing a
-rectangular array, the first character corresponding to the major
-order and the second to the minor order. Thus, for "BL", the
-major order is from bottom to top, and the minor order is from left
-to right. This means the bottom row is traversed first, from left
-to right, then the next row up, from left to right, and so on,
-until the topmost row is traversed.
-
-<DT ID="k:point"><STRONG>point</STRONG>
-<DD>"%f,%f('!')?" representing the point (x,y). The
-optional '!' indicates the
-node position should not change (input-only).
-<P>
-If <A HREF=#d:dim>dim</A> is 3, <B>point</B> may also have
-the format "%f,%f,%f('!')?" to represent the point (x,y,z).
-
-<DT ID="k:pointList"><STRONG>pointList</STRONG>
-<DD>A list of points, separated by spaces.
-
-<DT ID="k:portPos"><STRONG>portPos</STRONG>
-<DD>modifier indicating where on a node an edge should be aimed.
-It has the form <TT><I>portname</I>(:<I>compass_point</I>)?</TT>
-or <TT><I>compass_point</I></TT>.
-If the first form is used, the corresponding node must either have
-<A HREF=shapes.html#record>record</A> shape with one of its fields
-having the given <I>portname</I>,
-or have an <A HREF=shapes.html#html>HTML-like label</A>, one of
-whose components has a <TT>PORT</TT> attribute set to <I>portname</I>.
-<P>
-If a compass point is used, it must have the form
-<TT>"n","ne","e","se","s","sw","w","nw","c","_"</TT>. This modifies the edge
-placement to aim for the corresponding compass point on the port or,
-in the second form where no <I>portname</I> is supplied, on the node
-itself. The compass point "c" specifies the center of the node or port.
-The compass point "_" specifies that an appropriate side of the port
-adjacent to the exterior of the node should be used, if such exists.
-Otherwise, the center is used.
-If no compass point is used with a portname, the default value is "_".
-<P>
-<P>
-This attribute can be attached to an edge using the
-<A HREF=#d:headport>headport</A> and
-<A HREF=#d:tailport>tailport</A> attributes, or as part of the
-edge description as in
-<CENTER>
-<TT>node1:port1 -> node2:port5:nw;</TT>
-</CENTER>
-<P>
-Note that it is legal to have a portname the same as one of
-the compass points. In this case, this reference will be resolved to
-the port. Thus, if node <TT>A</TT> has a port <TT>w</TT>, then
-<TT>headport=w</TT> will refer to the port and not the compass point.
-At present, in this case, there is no way to specify that the compass
-point should be used.
-
-<DT ID="k:quadType"><STRONG>quadType</STRONG>
-<DD>"normal", "fast", "none".
-<P>
-Using "fast" gives about a 2-4 times overall speedup compared with "normal",
-though layout quality can suffer a little.
-
-<DT ID="k:rankType"><STRONG>rankType</STRONG>
-<DD>"same", "min", "source", "max", "sink"
-
-<DT ID="k:rankdir"><STRONG>rankdir</STRONG>
-<DD>"TB", "LR", "BT", "RL", corresponding to directed graphs drawn
-from top to bottom, from left to right, from bottom to top, and from
-right to left, respectively.
-
-<DT ID="k:rect"><STRONG>rect</STRONG>
-<DD>"%f,%f,%f,%f" The rectangle llx,lly,urx,ury gives the coordinates, in
- points, of the lower-left corner (llx,lly) and the upper-right corner
- (urx,ury).
-
-<DT ID="k:shape"><STRONG>shape</STRONG>
-<DD>A string specifying the <A HREF=shapes.html>shape</A> of a node.
-There are three
-main types of shapes :
-<A HREF=shapes.html#polygon>polygon-based</A>,
-<A HREF=shapes.html#record>record-based</A> and
-<A HREF=shapes.html#epsf>user-defined</A>.
-The record-based shape has largely been superseded and greatly generalized
-by <A HREF=shapes.html#html>HTML-like labels</A>.
-That is, instead of using <TT>shape=record</TT>, one might
-consider using <TT>shape=none</TT> and an HTML-like label.
-
-<DT ID="k:smoothType"><STRONG>smoothType</STRONG>
-<DD>Values are "none", "avg_dist", "graph_dist", "power_dist", "rng",
-"spring" and "triangle".
-
-<DT ID="k:splineType"><STRONG>splineType</STRONG>
-<DD>spline ( ';' spline )*<BR>
-<TABLE>
- <TR><TD ALIGN=right>where spline<TD>=<TD>(endp)? (startp)? point (triple)+</TR>
- <TR><TD ALIGN=right>and triple<TD>=<TD>point point point</TR>
- <TR><TD ALIGN=right>and endp<TD>=<TD>"e,%f,%f"</TR>
- <TR><TD ALIGN=right>and startp<TD>=<TD>"s,%f,%f"</TR>
-</TABLE>
-If a spline has points p<SUB>1</SUB> p<SUB>2</SUB> p<SUB>3</SUB> ... p<SUB>n</SUB>, (n = 1 (mod 3)), the points
- correspond to the control points of a cubic B-spline from p<SUB>1</SUB> to p<SUB>n</SUB>. If startp
- is given, it touches one node of the edge, and the arrowhead
- goes from p<SUB>1</SUB> to startp. If startp is not given, p<SUB>1</SUB> touches a node.
- Similarly for p<SUB>n</SUB> and endp.
-
-<DT ID="k:startType"><STRONG>startType</STRONG>
-<DD>has the syntax <TT>(<I>style</I>)?(<I>seed</I>)?</TT>.
-<P>
-If <I>style</I> is present, it must be one of the strings <TT>"regular"</TT>,
-<TT>"self"</TT>, or <TT>"random"</TT>. In the first case, the nodes are
-placed regularly about a circle. In the second case,
-an abbreviated version of neato is run to obtain the initial layout.
-In the last case, the nodes are placed randomly in a unit square.
-<P>
-If <I>seed</I> is present, it specifies a seed for the random number
-generator. If <I>seed</I> is a positive number, this is used as the
-seed. If it is anything else,
-the current time, and possibly the process id, is used to pick a seed,
-thereby making the choice more random. In this case, the seed value
-is stored in the graph.
-<P>
-If the value is just <TT>"random"</TT>, a time-based seed is chosen.
-<P>
-Note that input positions, specified by a node's
-<A HREF=#d:pos>pos</A>
-attribute, are only used when the style is <TT>"random"</TT>.
-
-<DT ID="k:string"><STRONG>string</STRONG>
-<DD>Text; a sequence of characters.
-
-<DT ID="k:style"><STRONG>style</STRONG>
-<DD>styleItem ( ',' styleItem )*<BR>
-<TABLE>
-<TR><TD ALIGN=right>where styleItem<TD>=<TD>name or name'('args')'</TR>
-<TR><TD ALIGN=right>and args<TD>=<TD>name ( ',' name )*</TR>
-</TABLE>
-and name can be any string of characters not containing a space, a left or
-right parenthesis, or a comma.
-Note that whitespace characters are ignored.
-<P>
-<B>NOTE:</B><EM>The styles <tt>tapered, striped</tt> and <tt>wedged</tt>
-are only available in release 2.30 and later.</EM>
-<P>
-At present, the recognized style names are
-"dashed", "dotted", "solid", "invis" and "bold" for nodes and edges,
-"tapered" for edges only,
-and "filled", "striped", "wedged", "diagonals" and "rounded" for nodes only.
-The styles "filled", "striped" and "rounded" are recognized for clusters.
-The style "radial" is recognized for nodes, clusters and graphs, and indicates a
-radial-style gradient fill if applicable.
-<P>
-The style "striped" causes the
-fill to be done as a set of vertical stripes. The colors are specified via a <A HREF=#k:colorList>colorList</A>,
-the colors drawn from left to right in list order. Optional color weights can be specified to indicate the
-proportional widths of the bars. If the sum of the weights is less than 1, the remainder is divided evenly
-among the colors with no weight. <B>Note</B>: The style "striped" is only supported with clusters and
-rectangularly-shaped nodes.
-<P>
-The style "wedged" causes the
-fill to be done as a set of wedges. The colors are specified via a <A HREF=#k:colorList>colorList</A>,
-with the colors drawn counter-clockwise starting at angle 0. Optional color weights are interpreted
-analogously to the striped case described above.
-<B>Note</B>: The style "wedged" is allowed only for elliptically-shaped nodes.
-<P>
-The following tables illustrate some of the effects of the style settings.
-Examples of tapered line styles are given below.
-Examples of linear and radial gradient fill can be seen under <A HREF=#k:colorList>colorList</A>.
-<P>
- <TABLE border=1>
- <CAPTION>Basic style settings for nodes</CAPTION>
- <TR><TD align="center"><tt>solid</tt> <TD><IMG SRC="n_solid.png">
- <TD align="center"><tt>dashed</tt> <TD><IMG SRC="n_dashed.png">
- <TD align="center"><tt>dotted</tt> <TD><IMG SRC="n_dotted.png"> </TR>
- <TR><TD align="center"><tt>bold</tt> <TD><IMG SRC="n_bold.png">
- <TD align="center"><tt>rounded</tt> <TD><IMG SRC="n_rounded.png">
- <TD align="center"><tt>diagonals</tt> <TD><IMG SRC="n_diagonals.png"> </TR>
- <TR><TD align="center"><tt>filled</tt> <TD><IMG SRC="n_filled.png">
- <TD align="center"><tt>striped</tt> <TD><IMG SRC="n_striped.png">
- <TD align="center"><tt>wedged</tt> <TD><IMG SRC="n_wedged.png"></TR>
- </TABLE>
-<P>
- <TABLE border=1>
- <CAPTION>Basic style settings for edges</CAPTION>
- <TR><TD align="center"><tt>solid</tt> <TD><IMG SRC="e_solid.png">
- <TD align="center"><tt>dashed</tt> <TD><IMG SRC="e_dashed.png"> </TR>
- <TR><TD align="center"><tt>dotted</tt> <TD><IMG SRC="e_dotted.png">
- <TD align="center"><tt>bold</tt> <TD><IMG SRC="e_bold.png"></TR> <TR>
- </TABLE>
-<P>
- <TABLE border=1>
- <CAPTION>Basic style settings for clusters</CAPTION>
- <TR><TD align="center"><tt>solid</tt> <TD><IMG SRC="c_solid.png">
- <TD align="center"><tt>dashed</tt> <TD><IMG SRC="c_dashed.png">
- <TD align="center"><tt>dotted</tt> <TD><IMG SRC="c_dotted.png">
- <TD align="center"><tt>bold</tt> <TD><IMG SRC="c_bold.png"> </TR>
- <TR><TD align="center"><tt>rounded</tt> <TD><IMG SRC="c_rounded.png">
- <TD align="center"><tt>filled</tt> <TD><IMG SRC="c_filled.png">
- <TD align="center"><tt>striped</tt> <TD><IMG SRC="c_striped.png"></TR>
- </TABLE>
-<P>
-The effect of <tt>style=tapered</tt> depends on the <A HREF=#d:penwidth>penwidth</A>,
-<A HREF=#d:dir>dir</A>, <A HREF=#d:arrowhead>arrowhead</A> and <A HREF=#d:arrowtail>arrowtail</A> attributes.
-The edge starts with width <tt>penwidth</tt> and tapers to width 1, in points. The <tt>dir</tt> attribute
-determines whether the tapering goes from tail to head (<tt>dir=forward</tt>), from head to
-tail (<tt>dir=forward</tt>), from the middle to both the head and tail (<tt>dir=both</tt>), or no
-tapering at all (<tt>dir=none</tt>). If the <tt>dir</tt> is not explicitly set, the default for the
-graph type is used (see <A HREF=#a:dir>dir</A>). Arrowheads and arrowtails are also drawn, based on the
-value of <tt>dir</tt>; to avoid this, set <tt>arrowhead</tt> and/or <TT>arrowtail</TT> to <TT>"none"</TT>.
-<P>
-<B>Note:</B> At present, the tapered style only allows a simple filled polygon.
-Additional styles such as <TT>dotted</TT> or <TT>dashed</TT>, or multiple colors
-supplied via a <A HREF=#k:colorList>colorList</A> are ignored.
-<P>
-The following table illustrates the <tt>style=tapered</tt> with <tt>penwidth=7</tt> and
-<tt>arrowtail=none</tt>.
- <TABLE border=1>
- <TR><TD><tt>dir</tt> \ <tt>arrowhead</tt><TD align="center"><tt>normal</tt><TD align="center"><tt>none</tt></TR>
- <TR><TD align="center"><tt>forward</tt> <TD><IMG SRC="normal_forward.png"> <TD><IMG SRC="none_forward.png"> </TR>
- <TR><TD align="center"><tt>back</tt> <TD><IMG SRC="normal_back.png"> <TD><IMG SRC="none_back.png"> </TR>
- <TR><TD align="center"><tt>both</tt> <TD><IMG SRC="normal_both.png"> <TD><IMG SRC="none_both.png"> </TR>
- <TR><TD align="center"><tt>none</tt> <TD><IMG SRC="normal_none.png"> <TD><IMG SRC="none_none.png"></TR>
- </TABLE>
-<P>
-Additional styles are available in
-device-dependent form. Style lists are passed to device drivers, which
-can use this to generate appropriate output.
-<P>
-The style attribute affects the basic appearance of nodes, edges and graphs,
-but has no effect on any text used in labels. For this, use the <A HREF=#d:fontname><TT>fontname</TT></A>, <A HREF=#d:fontsize><TT>fontsize</TT></A> and <A HREF=#d:fontcolor><TT>fontcolor</TT></A>
-attributes, or the <TT><FONT></TT>, <TT><B></TT>, <TT><I></TT>, etc.
-elements in <A HREF=shapes.html#html>HTML-like labels</A>.
-<P>
-The <TT>setlinewidth</TT> style value can be
-used for more control over the width of node borders and edges than is
-allowed by <TT>bold</TT>. This style value takes an argument, specifying the
-width of the line in <A HREF=#points>points</A>. For example, <TT>style="bold"</TT> is
-equivalent to <TT>style="setlinewidth(2)"</TT>.
-<B>The use of <TT>setlinewidth</TT> is deprecated; one should use the
-<A HREF=#d:penwidth><TT>penwidth</TT></A> attribute instead.</B>
-
-<DT ID="k:viewPort"><STRONG>viewPort</STRONG>
-<DD>"%lf,%lf,%lf,%lf,%lf" or "%lf,%lf,%lf,'%s'"
-<P>
-The viewPort <TT>W,H,Z,x,y</TT> or <TT>W,H,Z,N</TT>
-specifies a viewport for the final image. The pair (W,H) gives the
-dimensions (width and height) of the final image, in
-<A HREF=#points>points</A>.
-The optional Z is the zoom factor, i.e., the image in the original layout will be
-W/Z by H/Z points in size. By default, Z is 1.
-The optional last part is either a pair (x,y) giving a position in the original layout of the
-graph, in
-<A HREF=#points>points</A>, of the center of the viewport, or the name N
-of a node whose center should used as the focus.
-By default, the focus is the center of the graph bounding box, i.e.,
-(bbx/2,bby/2), where "bbx,bby" is the
-value of the bounding box attribute <A HREF=#a:bb>bb</A>.
-<P>
-Sample values: <TT>50,50,.5,'2.8 BSD'</TT> or <TT>100,100,2,450,300</TT>.
-The first will take the 100x100 point square centered on the node <TT>2.8 BSD</TT>
-and scale it down by 0.5, yielding a 50x50 point final image.
-
-</DL>
-</BODY>
-</HTML>
+<meta http-equiv="refresh" content="2;url=https://graphviz.org/doc/info/attrs.html" />
+Moved to <a href="https://graphviz.org/doc/info/attrs.html">https://graphviz.org/doc/info/attrs.html</a>. Redirecting...
projects / graphviz / commitdiff