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XSD <anyAttribute> Element

The <anyAttribute> element allows us to extend XML documents with attributes not specified by the schema!

The <anyAttribute> element allows us to extend XML documents with attributes not specified by the schema!

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

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

Please refer to this schema file, named "attribute.xsd":

The following XML (named "Myfamily.xml") uses components from different schemas, "family.xsd" and "attribute.xsd":

The above XML file is valid because the schema "family.xsd" allows us to add attributes to the "person" element.

Both <any> and <anyAttribute> can be used to create extensible documents! They enable documents to include additional elements not declared in the main XML schema.

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