This text file contains sample code fragments from:
Section 6.4 - Namespaces
Chapter 6 - Fundamental XML Schema: Types and Message Structure Basics
Book - Web Service Contract Design & Versioning for SOA
Series - Prentice Hall Service-Oriented Computing Series from Thomas Erl
Site - www.soabooks.com


<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://actioncon.com/schema/gameinfo"
  xmlns="http://actioncon.com/schema/gameinfo">
  <xsd:element name="game" type="GameType"/>
  <xsd:complexType name="GameType">
    <xsd:sequence>
      <xsd:element name="gtin" type="xsd:string"/>
      <xsd:element name="title" type="xsd:string"/>
    </xsd:sequence>
    <xsd:attribute name="productID" type="xsd:string"/>
  </xsd:complexType>
</xsd:schema>

Example 6.16 - An xsd:schema element with a targetNamespace attribute.


<games:game productID="AY2344"
  xmlns:games="http://actioncon.com/schema/gameinfo">
  <gtin>
    1234567890123
  </gtin>
  <title>
    Service Blaster 2000
  </title>
</games:game>

Example 6.17 - An XML document instance based on the previous XML schema. Note the use of the games: prefix to represent the
target namespace.


<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://actioncon.com/schema/gameinfo"
  xmlns="http://actioncon.com/schema/gameinfo">
  <xsd:element name="game" type="GameType"/>
  <xsd:complexType name="GameType">
    <xsd:sequence>
      <xsd:element ref="gtin"/>
      <xsd:element ref="title"/>
    </xsd:sequence>
    <xsd:attribute name="productID" type="xsd:string"/>
  </xsd:complexType>
  <xsd:element name="gtin" type="xsd:string"/>
  <xsd:element name="title" type="xsd:string"/>
</xsd:schema>

Example 6.18 - A different version of the schema in which three global elements are declared.


<games:game productID="AY2344"
  xmlns:games="http://actioncon.com/schema/gameinfo">
  <games:gtin>
    1234567890123
  </games:gtin>
  <games:title>
    Service Blaster 2000
  </games:title>
</games:game>

Example 6.19 - An XML document instance based on the previous schema. Because all three elements are global, they fall within the
target namespace and must be prefixed accordingly.


<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://actioncon.com/schema/gameinfo"
  xmlns:games="http://actioncon.com/schema/gameinfo">
  <xsd:element name="game" type="games:GameType"/>
  <xsd:element name="gtin" type="xsd:int"/>
  <xsd:element name="title" type="xsd:string"/>
  <xsd:complexType name="GameType">
    <xsd:sequence>
      <xsd:element ref="games:gtin"/>
      <xsd:element ref="games:title"/>
    </sequence>
    <xsd:attribute name="productID" type="xsd:string"/>
  </complexType>
</schema>

Example 6.20 - In this case, the target namespace is assigned to a prefix rather than being the default. As a result, the values of the
ref and type attributes must use prefixes to refer to elements and types by their qualified names.


<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://actioncon.com/schema/gameinfo"
  xmlns="http://actioncon.com/schema/gameinfo"
  elementFormDefault="qualified">
  <xsd:element name="game" type="GameType"/>
  <xsd:complexType name="GameType">
    <xsd:sequence>
      <xsd:element name="gtin" type="xsd:string"/>
      <xsd:element name="title" type="xsd:string"/>
    </xsd:sequence>
    <xsd:attribute name="productID" type="xsd:string"/>
  </xsd:complexType>
</xsd:schema>

Example 6.21 - Because the elementFormDefault attribute is set to “qualified,” all four elements are associated with the
target namespace.


<games:game productID="AY2344"
  xmlns:games="http://actioncon.com/schema/gameinfo">
  <games:gtin>
    1234567890123
  </games:gtin>
  <games:title>
    Service Blaster 2000
  </games:title>
</games:game>

Example 6.22 - An XML document where all elements belong to the same namespace. (Note how this example looks exactly like an earlier
example, where the gtin and title elements were declared globally.)


<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://actioncon.com/schema/gameinfo"
  xmlns="http://actioncon.com/schema/gameinfo">
  <xsd:element name="game" type="GameType"/>
  <xsd:complexType name="GameType">
    <xsd:sequence>
      <xsd:element name="gtin" type="xsd:string"
        form="qualified"/>
      <xsd:element name="title" type="xsd:string"/>
    </xsd:sequence>
    <xsd:attribute name="productID" type="xsd:string"/>
  </xsd:complexType>
</xsd:schema>

Example 6.23 - The form attribute is used with the gtin element declaration.


<games:game productID="AY2344"
  xmlns:games="http://actioncon.com/schema/gameinfo">
  <games:gtin>
    1234567890123
  </games:gtin>
  <title>
    Service Blaster 2000
  </title>
</games:game>

Example 6.24 - In this XML document instance, the title element is not prefixed because the corresponding schema did not bind it
to the target namespace.lement


<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://actioncon.com/schema/gameinfo"
  xmlns="http://actioncon.com/schema/gameinfo">
  ...
    <xsd:attribute name="productID" type="xsd:string"
      form="qualified"/>
  </xsd:complexType>
</xsd:schema>

Example 6.25 - The form attribute is used to associate the local productID attribute with the target namespace.


<games:game games:productID="AY2344"
  xmlns:games="http://actioncon.com/schema/gameinfo">
  ...
</games:game>

Example 6.26 - The productID attribute is prefixed with games: because of the use of the form attribute in the corresponding
schema.


<games xmlns="http://actioncon.com/schema/gameinfo">
  <game>
    <productID>AY234        </productID>
    <gtin>123456789012      </gtin>
    <title>Service Blaster 2000</title>
    <desc>This is a great game.</desc>
    <esrbRating>M</esrbRating>
    <msrPrice>29.99</msrPrice>
    <numberOfPlayers>
      <minimum>1</minimum>
      <maximum>        </maximum>
    </numberOfPlayers>
  </game>
  <!-- more games here -->
</games>

Example 6.27 - The contents of the response message to be used by the Game service.


<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://actioncon.com/schema/gameinfo"
  xmlns="http://actioncon.com/schema/gameinfo"
  elementFormDefault="qualified">
  <xsd:element name="games" type="GamesType"/>
  <xsd:complexType name="GamesType">
    <xsd:sequence>
      <xsd:element name="game" type="GameType"
        maxOccurs="unbounded"/>
    </xsd:sequence>
  </xsd:complexType>
  <xsd:complexType name="GameType">
    <xsd:sequence>
      <xsd:element name="productID" type="ProductIDType"/>
      <xsd:element name="gtin" type="GTINType"/>
      <xsd:element name="title" type="TitleType"/>
      <xsd:element name="desc" type="xsd:string"/>
      <xsd:element name="esrbRating" type="ESRBRatingType"/>
      <xsd:element name="msrPrice" type="PriceType"/>
      <xsd:element name="numberOfPlayers"
        type="NumberOfPlayersRangeType"/>
    </xsd:sequence>
  </xsd:complexType>
  <xsd:complexType name="TitleType">
    <xsd:simpleContent>
      <xsd:extension base="xsd:string">
        <xsd:attribute name="language" type="xsd:language"/>
      </xsd:extension>
    </xsd:simpleContent>
  </xsd:complexType>
  <xsd:complexType name="NumberOfPlayersRangeType">
    <xsd:sequence>
      <xsd:element name="minimum" type="xsd:short"/>
      <xsd:element name="maximum" type="xsd:short"
        minOccurs="0"/>
    </xsd:sequence>
  </xsd:complexType>
  <xsd:simpleType name="ProductIDType">
    <xsd:restriction base="xsd:string">
      <xsd:pattern value="[A-Z]{2}[0-9]{4}"/>
    </xsd:restriction>
  </xsd:simpleType>
  <xsd:simpleType name="GTINType">
    <xsd:restriction base="xsd:string">
      <xsd:length value="13"/>
    </xsd:restriction>
  </xsd:simpleType>
  <xsd:simpleType name="ESRBRatingType">
    <xsd:restriction base="xsd:string">
      <xsd:enumeration value="EC"/>
      <xsd:enumeration value="E"/>
      <xsd:enumeration value="E10+"/>
      <xsd:enumeration value="T"/>
      <xsd:enumeration value="M"/>
      <xsd:enumeration value="AO"/>
      <xsd:enumeration value="RP"/>
    </xsd:restriction>
  </xsd:simpleType>
  <xsd:simpleType name="PriceType">
    <xsd:restriction base="xsd:decimal">
      <xsd:totalDigits value="8"/>
      <xsd:fractionDigits value="2"/>
    </xsd:restriction>
  </xsd:simpleType>
</xsd:schema>

Example 6.28 -The complete XML schema for the response message.