<type>Attlist</type><name>source</name><comment>The attribute source links to the agent (person, organization) providing the specific annotation or markup</comment>
<xsd:attributeGroup name="source"><xsd:annotation><xsd:documentation><type>Attlist</type><name>source</name><comment>The attribute source links to the agent (person, organization) providing the specific annotation or markup</comment></xsd:documentation></xsd:annotation><xsd:attribute name="source" type="agentRef" use="required"/></xsd:attributeGroup>