Metadata is general
information about a document. In the OpenDocument format, all of the metadata
elements are contained in an <office:meta> element, usually located at start
of the document. Metadata elements may be omitted or occur multiple times. It
is application-specific how to update multiple instances of the same elements.
<define name="office-meta">
<optional>
<element
name="office:meta">
<ref
name="office-meta-content"/>
</element>
</optional>
</define>
<define name="office-meta-content">
<ref
name="anyElements"/>
</define>
<define name="office-meta-content-strict">
<zeroOrMore>
<ref
name="office-meta-data"/>
</zeroOrMore>
</define>