XML Schema anyAttribute Element | Rookie Tutorial

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XML Schema Tutorial

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XML Schema any Element XML Schema Element Substitution

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XSD <anyAttribute> Element

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The <anyAttribute> element gives us the ability to extend XML documents with attributes that are not specified by the schema!

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The <anyAttribute> element gives us the ability to extend XML documents with attributes that are not specified by the schema!

The following example is a fragment from an XML schema called "family.xsd". It shows us a declaration for the "person" element. By using the <anyAttribute> element, we can add any number of attributes to the "person" element:

<xs:element name="person"> <xs:complexType> <xs:sequence> <xs:element name="firstname" type="xs:string"/> <xs:element name="lastname" type="xs:string"/> </xs:sequence> <xs:anyAttribute/> </xs:complexType> </xs:element>

Now, we want to extend the "person" element with a "gender" attribute. In this case, we can do it even though the author of this schema never declared any "gender" attribute.

Look at this schema file named "attribute.xsd":

<?xml version="1.0" encoding="ISO-8859-1"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.w3schools.com" xmlns="http://www.w3schools.com" elementFormDefault="qualified"> <xs:attribute name="gender"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:pattern value="male|female"/>