XSD - <anyAttribute>

O elemento <xs: anyAttribute> é usado para estender a funcionalidade XSD. É usado para estender um elemento complexType definido em um xsd por um atributo que não está definido no esquema.

Considere um exemplo - person.xsd definiu personelemento complexType. attribute.xsd definiuage atributo.

person.xsd

<?xml version = "1.0" encoding = "UTF-8"?>
<xs:schema xmlns:xs = "http://www.w3.org/2001/XMLSchema"
   targetNamespace = "http://www.tutorialspoint.com"
   xmlns = "http://www.tutorialspoint.com"
   elementFormDefault = "qualified">

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

attributes.xsd

<?xml version = "1.0" encoding = "UTF-8"?>
<xs:schema xmlns:xs = "http://www.w3.org/2001/XMLSchema"
   targetNamespace = "http://www.tutorialspoint.com"
   xmlns = "http://www.tutorialspoint.com"
   elementFormDefault = "qualified">

   <xs:attribute name = "age">
      <xs:simpleType>
         <xs:restriction base = "xs:integer">
            <xs:pattern value = "[0-100]"/>
         </xs:restriction>
      </xs:simpleType>
   </xs:attribute>
	
</xs:schema>

Se quisermos definir uma pessoa com idade em XML, a seguinte declaração será inválida.

person.xml

<?xml version = "1.0"?>
<class xmlns = "http://www.tutorialspoint.com"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation = "http://www.tutorialspoint.com person.xsd
   http://www.tutorialspoint.com attributes.xsd">  

   <person age = "20">
      <firstname>Dinkar</firstname>
      <lastname>Kad</lastname>
      <nickname>Dinkar</nickname>  
   </person>
	
</class>

Use <xs: anyAttribute>

A fim de validar acima person.xml, adicione <xs: anyAttribute> a person elemento em person.xsd.

person.xsd

<?xml version = "1.0" encoding = "UTF-8"?>
<xs:schema xmlns:xs = "http://www.w3.org/2001/XMLSchema"
   targetNamespace = "http://www.tutorialspoint.com"
   xmlns = "http://www.tutorialspoint.com"
   elementFormDefault = "qualified">

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

</xs:schema>

Agora person.xml será validado contra person.xsd e attributes.xsd.

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