XSD - <qualquer>
<qualquer> elemento é usado para estender a funcionalidade XSD. Ele é usado para estender um elemento complexType definido em um XSD por um elemento que não está definido no esquema.
Considere um exemplo - person.xsd definiu personelemento complexType. address.xsd definiuaddress elemento complexType.
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>
address.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 = "address">
<xs:complexType>
<xs:sequence>
<xs:element name = "houseNumber" type = "xs:string"/>
<xs:element name = "street" type = "xs:string"/>
<xs:element name = "state" type = "xs:string"/>
<xs:element name = "zipcode" type = "xs:integer"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Se quisermos definir uma pessoa com endereço 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 address.xsd">
<person>
<firstname>Dinkar</firstname>
<lastname>Kad</lastname>
<nickname>Dinkar</lastname>
<address>
<houseNumber>101</firstname>
<street>Sector-1,Patiala</lastname>
<state>Punjab</lastname>
<zipcode>301202<zipcode>
</address>
</person>
</class>
Use <xs: any>
Para validar o person.xml acima, adicione <xs: any> ao elemento person 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:any minOccurs = "0"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Agora, person.xml será validado em relação a person.xsd e address.xsd.