<xs:attributeGroup name="defaultAttributesIDRequired"><xs:annotation><xs:documentation>Group of attributes used for all objects in an XMCDA instance</xs:documentation></xs:annotation><xs:attribute name="id" type="xs:string" use="required"/><xs:attribute name="name" type="xs:string" use="optional"/><xs:attribute name="mcdaConcept" type="xs:string" use="optional"/></xs:attributeGroup>