xsd:selector : selector « XML Schema « XML

1. XML
2. XML Schema
3. selector

xsd:selector

File: Data.xml

<?xml version="1.0"?>
<Books xmlns="http://www.java2s.com"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation=
                          "http://www.java2s.com
                           Schema.xsd">
        <Book>
                <Title>title 1</Title>
                <Author>author 1</Author>
                <Date>1998</Date>
                <ISBN>1-11111-111-1</ISBN>
                <Publisher>publisher 1</Publisher>
        </Book>
        <Book>
                <Title>title 2</Title>
                <Author>author 2</Author>
                <Date>1977</Date>
                <ISBN>2-222-22222-2</ISBN>
                <Publisher>publisher 2</Publisher>
        </Book>
</Books>

File: Schema.xsd


<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            targetNamespace="http://www.java2s.com"
            xmlns="http://www.java2s.com"
            xmlns:bk="http://www.java2s.com"
            elementFormDefault="qualified">
    <xsd:element name="Books">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="Book" maxOccurs="unbounded">
                    <xsd:complexType>
                        <xsd:sequence>
                            <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:sequence>
                    </xsd:complexType>
                </xsd:element>
            </xsd:sequence>
        </xsd:complexType>
        <xsd:key name="PK">
            <xsd:selector xpath="bk:Book"/>
            <xsd:field xpath="bk:ISBN"/>
        </xsd:key>
    </xsd:element>
</xsd:schema>

 

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