<xs:attributeGroup name="newsContentTypeAttributes">
    <xs:annotation>
        <xs:documentation>A group of attributes representing a content type</xs:documentation>
    </xs:annotation>
    <xs:attribute name="contenttype" type="xs:string" use="optional">
        <xs:annotation>
            <xs:documentation>An IANA MIME type</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="format" type="QCodeType" use="optional">
        <xs:annotation>
            <xs:documentation>A refinement of a generic content type (i.e. IANA MIME type) - expressed by a QCode</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="formaturi" type="IRIType" use="optional">
        <xs:annotation>
            <xs:documentation>A refinement of a generic content type (i.e. IANA MIME type) - expressed by a URI</xs:documentation>
        </xs:annotation>
    </xs:attribute>
</xs:attributeGroup>