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Sample XSD File: Relationships

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The following XSD file is used in various examples in the XSD Schema Designer documentation. This file is a purchase order schema with annotations and documentation.

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:element name="pet" type="PetType"/>

  <xs:attributeGroup name="NameAgeAttributes">
    <xs:attribute name="age" type="xs:integer" use="required"/>
    <xs:attribute name="name" type="xs:string" use="required"/>
  </xs:attributeGroup>

  <xs:complexType name="PetType">
    <xs:attributeGroup ref="NameAgeAttributes"/>
  </xs:complexType>

  <xs:element name="cat" substitutionGroup="pet">
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="PetType">
          <xs:sequence>
            <xs:element name="weight" type="xs:integer"/>
            <xs:element name="color" type="xs:string"/>
            <xs:element name="breed" type="xs:integer"/>
          </xs:sequence>
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>

  <xs:element name="dog" substitutionGroup="pet">
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="PetType">
          <xs:sequence>
            <xs:element name="weight" type="xs:integer"/>
            <xs:element name="color" type="xs:string"/>
            <xs:element name="breed" type="xs:integer"/>
          </xs:sequence>
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>

</xs:schema>