<elementSpec ident="category" module="MEI.header">
<desc xml:lang="en">Contains an individual descriptive category in a user-defined taxonomy, possibly nested
within a superordinate category.</desc>
<classes>
<memberOf key="att.common"/>
<memberOf key="att.authorized"/>
<memberOf key="att.bibl"/>
<memberOf key="att.dataPointing"/>
</classes>
<content>
</content>
<constraintSpec ident="category_id" scheme="schematron">
<constraint>
<sch:rule context="mei:category">
<sch:assert test="@xml:id" role="warning">To be addressable, the category element must
have an xml:id attribute.</sch:assert>
</sch:rule>
</constraint>
</constraintSpec>
</elementSpec>