elml:DidReq

<xs:attributeGroup name="DidReq">
  <xs:attribute name="responsible" use="required">
    <xs:annotation>
      <xs:documentation>The attribute responsible allows to define what a specific person has done for this lesson. The values to select are Overall (did everything), Concept (did only work on concepts for the lesson), Content (wrote/designed content), Specials (only special things like flashs etc.), Translation (if they've done the translation), Revision (if they've done revisions/updates of the lesson) or Contact (to name a specific contact person for a lesson, who should be contacted before making changes to the lesson).</xs:documentation>
    </xs:annotation>
    <xs:simpleType>
      <xs:restriction base="xs:string">
        <xs:enumeration value="Overall"/>
        <xs:enumeration value="Concept"/>
        <xs:enumeration value="Content"/>
        <xs:enumeration value="Specials"/>
        <xs:enumeration value="Translation"/>
        <xs:enumeration value="Revision"/>
        <xs:enumeration value="Contact"/>
      </xs:restriction>
    </xs:simpleType>
  </xs:attribute>
</xs:attributeGroup>