bibID 

The attribute bibID allows giving an unique id to a resource item in the bibliography. Bibliography items are referenced by the values of this attribute.

Attribute Information

Used By

Attribute Group elml:BibIDReq

Source 

<xs:attribute name="bibID" type="xs:string" use="required">
  <xs:annotation>
    <xs:documentation>The attribute bibID allows giving an unique id to a resource item in the bibliography. Bibliography items are referenced by the values of this attribute.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample