<xsd:extension> Element (simpleContent) 

Contains extensions on simpleContent. This extends a simple type or a complex type that has simple content by adding specified attribute(s), attribute group(s), or anyAttribute.

<extension
  base = QName
  id = ID 
  {any attributes with non-schema Namespace}...>
Content: (annotation?, ((attribute | attributeGroup)*, anyAttribute?))
</extension> 

Attributes

• base
  The name of a built-in data type, simpleType element, or complexType which has simple content.

  The base value must be a qualified name (QName).

  Required.

• id
  The ID of this element. The id value must be of type ID and be unique within the document containing this element.

  Optional.

Element Information

Example

The following example extends a defined simpleType by adding an enumerated attribute.

<xs:simpleType name="mountainBikeSize">
  <xs:restriction base="xs:string">
    <xs:enumeration value="small" />
    <xs:enumeration value="medium" />
    <xs:enumeration value="large" />
  </xs:restriction>
</xs:simpleType>

<xs:complexType name="FamilyMountainBikes">
  <xs:simpleContent>
    <xs:extension base="mountainBikeSize">
      <xs:attribute name="familyMember">
      <xs:restriction base="xs:string">
        <xs:enumeration value="child" />
        <xs:enumeration value="male" />
        <xs:enumeration value="female" />
      </xs:restriction>
    </xs:attribute>
    </xs:extension>
  </xs:simpleContent>
</xs:complexType>

Other Resources

For more information see the W3C XML Schema Part 1: Structures Recommendation at www.w3.org/TR/2001/REC-xmlschema-1-20010502\#element-all.

See Also

Reference

XML Schemas (XSD) Reference
XML Schema Elements