XML/XML Schema/Reference

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Nexted reference

File: Data.xml
<?xml version="1.0"?>
<images xmlns="http://www.wbex.ru"
                   xmlns:i="http://www.wbex.ru"
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   xsi:schemaLocation="http://www.wbex.ru Schema.xsd">
    <image/>                            
    <image i:src="http://www.wbex.ru"/>
</images>
File: Schema.xml
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="http://www.wbex.ru"
            xmlns="http://www.wbex.ru"
            elementFormDefault="qualified">
    <xsd:element name="image">
        <xsd:complexType>
            <xsd:attribute ref="src"/>
        </xsd:complexType>
    </xsd:element>
    <xsd:attribute name="src">
        <xsd:simpleType>
            <xsd:restriction base="xsd:anyURI">
                <xsd:enumeration value="http://www.wbex.ru"/>
                <xsd:enumeration value="http://www.wbex.ru/style/logo.png"/>
                <xsd:enumeration value="http://www.wbex.ru/isbn.html"/>
            </xsd:restriction>
        </xsd:simpleType>
    </xsd:attribute>
    <xsd:element name="images">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element ref="image" maxOccurs="2"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
</xsd:schema>



Reference defined data type with target namespace

File: Data.xml
<?xml version="1.0"?>
<employees
  xmlns="http://www.wbex.ru/employees"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.wbex.ru/employees Schema.xsd"
  source="source"
  version="1.0">
  <employee person="persiondata" tags="tag content">
    <name>
      <first>first</first>
      <middle>middle</middle>
      <last>last</last>
    </name>
    <location>
      <latitude>1</latitude>
      <longitude>2</longitude>
      <address>USA</address>
    </location>
    <phone>1234567890</phone>
    <description>data<em>data</em></description>
  </employee>
</employees>

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>
      <sequence>
        <element name="employee" minOccurs="0" maxOccurs="unbounded">
          <complexType>
            <sequence>
              <element name="name" type="employees:NameType"/>
              <element name="location" type="employees:LocationType"/>
              <element name="phone" type="employees:PhoneType"/>
              <element name="description" type="employees:DescriptionType"/>
            </sequence>
            <attribute name="tags" type="token"/>
            <attribute name="person" type="ID"/>
          </complexType>
        </element>
      </sequence>
      <attributeGroup ref="employees:employeeAttributes"/>
    </complexType>
  </element>
  <complexType name="NameType">
    <group ref="employees:NameGroup"/>
    <attribute name="title" type="string"/>
  </complexType>
  <group name="NameGroup">
    <sequence>
      <element name="first" type="string" minOccurs="1" maxOccurs="unbounded"/>
      <element name="middle" type="string" minOccurs="0" maxOccurs="1"/>
      <element name="last" type="string"/>
    </sequence>
  </group>
  <complexType name="LocationType">
    <choice minOccurs="0" maxOccurs="unbounded">
      <element name="address" type="string"/>
      <sequence>
        <element name="latitude" type="float"/>
        <element name="longitude" type="float"/>
      </sequence>
    </choice>
  </complexType>
  <complexType name="PhoneType">
    <simpleContent>
      <extension base="string">
        <attribute name="kind" default="Home">
          <simpleType>
            <restriction base="string">
              <enumeration value="Home"/>
              <enumeration value="Work"/>
              <enumeration value="Cell"/>
              <enumeration value="Fax"/>
            </restriction>
          </simpleType>
        </attribute>
      </extension>
    </simpleContent>
  </complexType>
  <complexType name="DescriptionType" mixed="true">
    <choice minOccurs="0" maxOccurs="unbounded">
      <element name="em" type="string"/>
      <element name="strong" type="string"/>
      <element name="br" type="string"/>
    </choice>
  </complexType>
</schema>



reference element

<?xml version="1.0"?>
<name xmlns="http://www.wbex.ru/name"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.wbex.ru/name Schema.xsd"
  title="Mr.">
  <first>first</first>
  <middle>middle</middle>
  <last>last</last>
</name>
File: Schema.xsd
<?xml version="1.0"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:target="http://www.wbex.ru/name"
  targetNamespace="http://www.wbex.ru/name"
  elementFormDefault="qualified">
  <element name="first" type="string" />
  <element name="middle" type="string" />
  <element name="last" type="string" />
  <complexType name="NameType">
    <sequence>
      <element ref="target:first" />
      <element ref="target:middle" />
      <element ref="target:last" />
    </sequence>
    <attribute name="title" type="string" />
  </complexType>
  <element name="name" type="target:NameType" />
</schema>



reference with maxOccurs

File: Data.xml
<?xml version="1.0"?>
<ElementExamples xmlns="http://www.wbex.ru"
                   xmlns:ex="http://www.wbex.ru"
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   xsi:schemaLocation=
                              "http://www.wbex.ru
                               Schema.xsd">
    <aircraft>F-16</aircraft> 
</ElementExamples>
File: Schema.xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="http://www.wbex.ru"
            xmlns="http://www.wbex.ru"
            elementFormDefault="qualified">
    <xsd:element name="aircraft" type="xsd:string"/>
    <xsd:element name="ElementExamples">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element ref="aircraft" maxOccurs="2"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
</xsd:schema>



Reference your type with namespace

File: Data.xml
<?xml version="1.0"?>
<Books xmlns="http://www.wbex.ru"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://www.wbex.ru Schema.xsd">
        <Book>
                <Title>title 1</Title>
                <Author>author 1</Author>
                <Date>2008</Date>
                <ISBN>1-11111-111-1</ISBN>
                <Publisher>Publisher 1</Publisher>
        </Book>
        <Book>
                <Title>title 2</Title>
                <Author>author 2</Author>
                <Date>2007</Date>
                <ISBN>0-111-11111-1</ISBN>
                <Publisher>Publisher 2</Publisher>
        </Book>
        <Book>
                <Title>title 3</Title>
                <Author>author 3</Author>
                <Date>2004</Date>
                <ISBN>0-11-111111-1</ISBN>
                <Publisher>Publisher 3</Publisher>
        </Book>        
</Books>
File: Schema.xml
<?xml version="1.0"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
        targetNamespace="http://www.wbex.ru"
        xmlns:bk="http://www.wbex.ru"
        elementFormDefault="qualified">
    <element name="Books">
        <complexType>
            <sequence>
                <element ref="bk:Book" minOccurs="1" maxOccurs="unbounded"/>
            </sequence>
        </complexType>
    </element>
    <element name="Book">
        <complexType>
            <sequence>
                <element ref="bk:Title"/>
                <element ref="bk:Author"/>
                <element ref="bk:Date"/>
                <element ref="bk:ISBN"/>
                <element ref="bk:Publisher"/>
            </sequence>
        </complexType>
    </element>
    <element name="Title" type="string"/>
    <element name="Author" type="string"/>
    <element name="Date" type="string"/>
    <element name="ISBN" type="string"/>
    <element name="Publisher" type="string"/>
</schema>



Refernece anonymous complexType

File: Data.xml
<?xml version="1.0"?>
<images xmlns="http://www.wbex.ru"
                   xmlns:ex="http://www.wbex.ru"
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   xsi:schemaLocation="http://www.wbex.ru Schema.xsd">
    <image/>
    <image src="http://www.wbex.ru"/>
</images>
File: Schema.xml
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="http://www.wbex.ru"
            xmlns="http://www.wbex.ru"
            elementFormDefault="qualified">
    <xsd:element name="image">
        <xsd:complexType>
            <xsd:attribute name="src">
                <xsd:simpleType>
                    <xsd:restriction base="xsd:anyURI">
                        <xsd:enumeration value="http://www.wbex.ru"/>
                        <xsd:enumeration value="http://www.wbex.ru/style/logo.png"/>
                        <xsd:enumeration value="http://www.wbex.ru/isbn.html"/>
                    </xsd:restriction>
                </xsd:simpleType>
            </xsd:attribute>
        </xsd:complexType>
    </xsd:element>
    <xsd:element name="images">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element ref="image" maxOccurs="2"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
</xsd:schema>



Set minOccurs, maxOccurs for referenced types

File: Data.xml
<?xml version="1.0"?>
<Books xmlns="http://www.wbex.ru"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://www.wbex.ru Schema.xsd">
        <Book>
                <Title>title 1</Title>
                <Author>author 1</Author>
                <Date>2008</Date>
                <ISBN>1-11111-111-1</ISBN>
                <Publisher>Publisher 1</Publisher>
        </Book>
        <Book>
                <Title>title 2</Title>
                <Author>author 2</Author>
                <Date>2007</Date>
                <ISBN>0-111-11111-1</ISBN>
                <Publisher>Publisher 2</Publisher>
        </Book>
        <Book>
                <Title>title 3</Title>
                <Author>author 3</Author>
                <Date>2004</Date>
                <ISBN>0-11-111111-1</ISBN>
                <Publisher>Publisher 3</Publisher>
        </Book>
</Books>
File: Schema.xsd
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="http://www.wbex.ru"
            xmlns="http://www.wbex.ru"
            elementFormDefault="qualified">
    <xsd:element name="Books">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element ref="Book" minOccurs="1" maxOccurs="unbounded"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
    <xsd:element name="Book">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element ref="Title" minOccurs="1" maxOccurs="1"/>
                <xsd:element ref="Author" minOccurs="1" maxOccurs="1"/>
                <xsd:element ref="Date" minOccurs="1" maxOccurs="1"/>
                <xsd:element ref="ISBN" minOccurs="1" maxOccurs="1"/>
                <xsd:element ref="Publisher" minOccurs="1" maxOccurs="1"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
    <xsd:element name="Title" type="xsd:string"/>
    <xsd:element name="Author" type="xsd:string"/>
    <xsd:element name="Date" type="xsd:string"/>
    <xsd:element name="ISBN" type="xsd:string"/>
    <xsd:element name="Publisher" type="xsd:string"/>
</xsd:schema>



Use ref to remove the nested definition

File: Data.xml
<?xml version="1.0"?>
<ElementExamples xmlns="http://www.wbex.ru"
                   xmlns:ex="http://www.wbex.ru"
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   xsi:schemaLocation=
                              "http://www.wbex.ru
                               Schema.xsd">
    <aircraft>
        <type>F-16</type>
    </aircraft>  
</ElementExamples>
File: Schema.xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="http://www.wbex.ru"
            xmlns="http://www.wbex.ru"
            elementFormDefault="qualified">
    <xsd:element name="aircraft">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="type" type="xsd:string"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
    <xsd:element name="ElementExamples">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element ref="aircraft" maxOccurs="2"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
</xsd:schema>
Источник — «http://wbex.ru/index.php?title=XML/XML_Schema/Reference&oldid=10137»