Name

xs:keyref

Synopsis

<xs:keyref
  id = "ID"
  name = "NCName"
  refer = "QName" >
  <!-- (xs:annotation?, (xs:selector, xs:field+) ) -->
</xs:keyref>

The xs:keyref element is placed inside xs:element elements to require that the element selected by the xs:selector must match an xs:key or xs:unique with the name given by the refer attribute. The key that is referred to must be a child of one of the ancestors of this xs:keyref. The value that is matched against the specified key is determined by the concatenation of the values of the xs:field child elements.