<xs:element ref="docbook:productname"/>
<xs:element ref="docbook:productnumber"/>
</xs:choice>
+ <xs:sequence>
+ <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
+ </xs:sequence>
</xs:choice>
<xs:attribute name="role"/>
<xs:attributeGroup ref="docbook:db.common.attributes"/>