References 

This optional element contains a list of referenced documents.  These documents may contain a more complete description or other useful information.

Element Information

Model

Reference+
Children: Reference

Source 

<xs:element name="References" minOccurs="0">
  <xs:annotation>
    <xs:documentation>This optional element contains a list of referenced documents. These documents may contain a more complete description or other useful information.</xs:documentation>
  </xs:annotation>
  <xs:complexType>
    <xs:sequence>
      <xs:element name="Reference" maxOccurs="unbounded">
        <xs:annotation>
          <xs:documentation>This element is used to reference an external document. Note: these referenced documents are not considered to be part of the XidML document.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:all>
            <xs:element name="Alias" type="xs:string" minOccurs="0">
              <xs:annotation>
                <xs:documentation>This element can be used to assign an alias to the referenced document.</xs:documentation>
              </xs:annotation>
            </xs:element>
            <xs:element name="Location" type="xs:anyURI">
              <xs:annotation>
                <xs:documentation>Contains the URI of the referenced document</xs:documentation>
              </xs:annotation>
            </xs:element>
            <xs:element name="Description" type="xs:string" minOccurs="0">
              <xs:annotation>
                <xs:documentation>An optional element that can be used to provide a brief description of the referenced document</xs:documentation>
              </xs:annotation>
            </xs:element>
          </xs:all>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>
</xs:element>

Sample