The class attribute is used to select the type of content.
Anonymous
<contentFlavourGroup
language="token"
userLevel="token"
technology="token"
textType="token"
/>
<attribute name="textType" default="normal" >
<simpleType>
<restriction base="token">
<enumeration value="normal" />
<enumeration value="overview" />
<enumeration value="prescriptive" />
<enumeration value="abstract" />
<enumeration value="conclusion" />
<enumeration value="legal" />
<enumeration value="prerequisite" />
<enumeration value="advertisement" />
</restriction>
</simpleType>
</attribute>