<xs:element name="Catalog" >
  <xs:annotation>
    <xs:documentation>
=================================== Catalog ====================================
A container for Resource and TopicUse elements. Resource elements map URNs to
URLs and indicate default vocabularies which apply to the formal names of
certain elements within the subtree that begins with the immediate parent of
the Catalog element. TopicUse elements indicate where in the NewsML document
certain Topics are used. The optional Href attribute provides a pointer to
a Catalog element elsewhere in this or another document. Its value consists of
a # character followed by the value of the Duid attribute of the referenced
Catalog element and preceded, if the referenced Catalog is not in the current
document, by an http URL or a NewsML URN identifying the document or NewsItem
in which the Catalog appears. If the Href attribute is present on a Catalog
element, then that element should be empty. If it contains subelements, the
NewsML system may signal an error.
================================================================================

      </xs:documentation>
  </xs:annotation>
  <xs:complexType>
    <xs:sequence>
      <xs:element minOccurs="0" maxOccurs="unbounded" ref="Resource"/>
      <xs:element minOccurs="0" maxOccurs="unbounded" ref="TopicUse"/>
    </xs:sequence>
    <xs:attributeGroup ref="localid"/>
    <xs:attribute name="Href" type="xs:string"/>
  </xs:complexType>
</xs:element>