<xs:complexType name="categories"><xs:sequence><xs:annotation><xs:documentation>A set of categories and some preferential information on them.</xs:documentation></xs:annotation><xs:element name="description" type="xmcda:description" minOccurs="0"/><xs:element name="category" type="xmcda:category" maxOccurs="unbounded"/></xs:sequence><xs:attributeGroup ref="xmcda:defaultAttributes"/></xs:complexType>