`%Navigation`

Navigation : éléments portant une navigation documentaire
dbk:%nav^<1>

Parents`<^>`

book ;

%Navigation ; article, chapter, colophon, info, part, section, title ;

(bibliography | index | contents)

<xs:group name="Navigation">

<xs:choice>: <xs:element ref="bibliography"/>

<xs:element ref="index"/>

<xs:element ref="contents"/>
</xs:choice>

</xs:group>