XML in a Nutshell, 3rd Edition

Name

xs:redefine

Synopsis

<xs:redefine
  id = "ID"
  schemaLocation = "anyURI" >
  <!-- (annotation | (simpleType | complexType | group | attributeGroup))* 
    -->
</xs:redefine>

The xs:redefine element is used much like xs:include. That is, it inserts definitions and declarations for the same target namespace from a schema document found at a URL specified by the schemaLocation attribute. However, unlike xs:include, xs:redefine can override type, model group, and attribute group definitions from the included schema. The new type and group definitions are children of the xs:redefine element. They must extend or restrict the original definition of the redefined type or group. Note, however, that xs:redefine cannot override element and attribute declarations made in the included schema.