     |
Declaring a Global Attribute
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" ...> <xsd:attribute name="attribute-name" type="xsd:string" use="optional" default="string-value"/> </schema>
An attribute declared as a direct child of the schema root element is considered a 'global' attribute and is automatically declared in the target-namespace.
A 'name' attribute is required for a global defined attribute.
Referencing a Global Attribute
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" ...>
<xsd:attribute name="attribute-name" type="xsd:string" use="optional" default="string-value"/>
<xsd:complexType name="complex-type">
<xsd:attribute ref="attribute-name"/>
</xsd:complexType>
</schema>
Reuse a global defined attribute, by referencing the attribute, using the 'ref' attribute.
The 'use' attribute defines whether the attribute is optional (default), required or prohibited (only makes sense when specified on an element).
The 'default' attribute defines the attribute's default value, this attribute can only be specified if the 'use' attribute specifies optional.
The 'fixed' attribute defines the attribute's fixed value, this attribute can only be specified if the 'use' attribute specifies optional.
Attribute declarations can use the 'type' attribute to reference a simple type.
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" ...>
<xsd:attribute name="attribute-name" type="simple-type"/>
<xsd:simpleType name="simple-type">
...
</xsd:simpleType>
</schema>
Attributes can use the child-element 'simpleType' to specify a simple-type locally.
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" ...>
<xsd:attribute name="attribute-name">
<xsd:simpleType>
...
</xsd:simpleType>
</attribute>
</schema>