because Norm removed that parameter due to
obsolescence.
<!ENTITY callout.unicode.start.character SYSTEM "../params/callout.unicode.start.character.xml">
<!ENTITY callouts.extension SYSTEM "../params/callouts.extension.xml">
<!ENTITY chapter.autolabel SYSTEM "../params/chapter.autolabel.xml">
-<!ENTITY chunk.datafile SYSTEM "../params/chunk.datafile.xml">
<!ENTITY chunk.first.sections SYSTEM "../params/chunk.first.sections.xml">
<!ENTITY chunk.quietly SYSTEM "../params/chunk.quietly.xml">
<!ENTITY chunk.section.depth SYSTEM "../params/chunk.section.depth.xml">
&chunk.section.depth;
&chunk.first.sections;
&chunk.quietly;
-&chunk.datafile;
&navig.graphics;
&navig.graphics.extension;
&navig.graphics.path;
<src:fragref linkend="callout.unicode.start.character.frag"/>
<src:fragref linkend="callouts.extension.frag"/>
<src:fragref linkend="chapter.autolabel.frag"/>
-<src:fragref linkend="chunk.datafile.frag"/>
<src:fragref linkend="chunk.first.sections.frag"/>
<src:fragref linkend="chunk.quietly.frag"/>
<src:fragref linkend="chunk.section.depth.frag"/>