for the endpoints, in which case it is referred to as a linear ring and
additionally considered closed).</para>
- <informaltable>
+ <informaltable border="0" frame="none">
<tgroup cols="2" align="center">
<tbody>
<row>
any two elements occurs at <varname>POINT</varname>s that are on the
boundaries of both elements. </para>
- <informaltable>
+ <informaltable border="0" frame="none">
<tgroup cols="3" align="center">
<tbody>
<row>
A <varname>POLYGON</varname> may not have cut lines or spikes and the
interior rings must be contained entirely within the exterior ring.</para>
- <informaltable>
+ <informaltable border="0" frame="none">
<tgroup cols="3" align="center">
<tbody>
<row>
elements intersect. The boundaries of any two elements may touch, but
only at a finite number of <varname>POINT</varname>s.</para>
- <informaltable>
+ <informaltable border="0" frame="none">
<tgroup cols="2" align="center">
<tbody>
<row>