A DocBook DTD Fragment

<!ENTITY % chapter.module "INCLUDE">
<![%chapter.module;[
<!ENTITY % local.chapter.attrib "">
<!ENTITY % chapter.role.attrib "%role.attrib;">

<!ENTITY % chapter.element "INCLUDE">
<![%chapter.element;[
<!ELEMENT chapter %ho; (beginpage?,
                    chapterinfo?,
                    (%bookcomponent.title.content;),
                    (%nav.class;)*,
                    tocchap?,
                    (%bookcomponent.content;),
                    (%nav.class;)*)
                %ubiq.inclusion;>
<!--end of chapter.element-->]]>

<!ENTITY % chapter.attlist "INCLUDE">
<![%chapter.attlist;[
<!ATTLIST chapter
                %label.attrib;
                %status.attrib;
                %common.attrib;
                %chapter.role.attrib;
                %local.chapter.attrib;
>
<!--end of chapter.attlist-->]]>
<!--end of chapter.module-->]]>