extension (complexContent)

Contains extensions on <complexContent>.

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

Attributes

base

The name <complexType> element.

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 <complexType> element by adding an element and an attribute.

<xs:complexType name="address">
  <xs:sequence>
    <xs:element name="street" type="xs:string" />
    <xs:element name="city" type="xs:string" />
  </xs:sequence>
</xs:complexType>

<xs:complexType name="USAddress">
  <xs:complexContent>
    <xs:extension base="address">
      <xs:sequence>
        <xs:element name="state" type="xs:string" />
      </xs:sequence>
      <xs:attribute name="country" type="xs:string" fixed="US" />
    </xs:extension>
  </xs:complexContent>
</xs:complexType>

See Also

XML Schema Reference (XSD) | XML Schema Elements

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