Processing XML - Java - page 809

<xs:simpleType> <xs:simpleType>

<xs:restriction

<xs:restriction base= "xs:string" >
<xs:enumeration

<xs:enumeration value= "intranet" //>
</xs:restriction>

</xs:restriction>
</xs:simpleType> </xs:simpleType>

</xs:attribute> </xs:attribute>

</xs:complexType>

</xs:complexType>
</xs:element> </xs:element>

<xs:element

<xs:element name= "name" type= "xs:string" >
</xs:element>

</xs:element>
<xs:element

<xs:element name= "people" >
<xs:complexType>

<xs:complexType>
<xs:sequence>

<xs:sequence>
<xs:element <xs:element ref= "tns:person" maxOccurs= "unbounded" //>

</xs:sequence> </xs:sequence>

</xs:complexType>

</xs:complexType>
</xs:element> </xs:element>

<xs:element

<xs:element name= "person" >
<xs:complexType> <xs:complexType>

<xs:sequence> <xs:sequence>

<xs:element

<xs:element ref= "tns:name" //>
<xs:element

<xs:element ref= "tns:email" //>
<xs:element <xs:element ref= "tns:country" //>

</xs:sequence> </xs:sequence>

</xs:complexType>

</xs:complexType>
</xs:element> </xs:element>

</xs:schema> </xs:schema>

Define my namespace as a URN (see Network Logging with log4j ) .

De fine one of the person components, the country (others done similary).

De fine country as an enumeration (could become a Java enum ).

Fi nally, define the root element, a sequence of person elements.

Example 20-12 shows how we assert our claim to the schema in a document.

Example 20-12. people-schema.xml
<people <people xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance"

xmlns="urn:darwinsys:people"
xsi:schemaLocation="urn:darwinsys:people ./people.xsd" >