XML/XML Schema/attributeGroup

Define and use attributeGroup

File: Data.xml
<?xml version="1.0"?>
<employees
  xmlns="http://www.wbex.ru/employees"
  xmlns:name="http://www.wbex.ru/name"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.wbex.ru/employees Schema.xsd"
  source="from where"
  version="1.0"/>

File: Schema.xsd
<?xml version="1.0"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:employees="http://www.wbex.ru/employees"
  targetNamespace="http://www.wbex.ru/employees"
  elementFormDefault="qualified">

  <attributeGroup name="employeeAttributes">
    <attribute name="version" type="decimal" fixed="1.0" />
    <attribute name="source" type="string"/>
  </attributeGroup>
  <element name="employees">
    <complexType>
      <attributeGroup ref="employees:employeeAttributes"/>
    </complexType>
  </element>
</schema>

Reference an attribute group

File: Data.xml
<?xml version="1.0"?>
<addr:address xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://www.wbex.ru Schema.xsd"
              xmlns:addr="http://www.wbex.ru"
              addr:language="en">
    
</addr:address>
File: Schema.xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://www.wbex.ru"
  xmlns:addr="http://www.wbex.ru"
  attributeFormDefault="qualified"
  elementFormDefault="qualified">
  
 <xsd:element name="address">
  <xsd:complexType mixed="true">
    <xsd:simpleContent>
      <xsd:extension base="xsd:string">
        <xsd:attributeGroup ref="addr:nationality"/>
      </xsd:extension>
    </xsd:simpleContent>
  </xsd:complexType>
 </xsd:element>
 <xsd:attributeGroup name="nationality">
    <xsd:attribute name="language" type="xsd:language"/>
 </xsd:attributeGroup>
</xsd:schema>