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POXML / XSD how to create a key
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  1. POXML / XSD how to create a key
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    copied!<p>I am having problems defining a key in XML Schema.</p> <p><strong>CODE:</strong></p> <p>XSD:</p> <pre><code> &lt;xsd:element name="players"&gt; &lt;xsd:complexType&gt; &lt;xsd:sequence&gt; &lt;xsd:element name="player" minOccurs="0" maxOccurs="unbounded"&gt; &lt;xsd:complexType&gt; &lt;xsd:all&gt; &lt;xsd:element name="date-of-birth" type="xsd:date"&gt;&lt;/xsd:element&gt; &lt;xsd:element name="gender"&gt; &lt;xsd:simpleType&gt; &lt;xsd:restriction base="xsd:string"&gt; &lt;xsd:enumeration value="MALE" /&gt; &lt;xsd:enumeration value="FEMALE" /&gt; &lt;/xsd:restriction&gt; &lt;/xsd:simpleType&gt; &lt;/xsd:element&gt; &lt;/xsd:all&gt; &lt;xsd:attribute name="username" type="xsd:string" use="required" /&gt; &lt;/xsd:complexType&gt; &lt;xsd:key name="playerkey"&gt; &lt;xsd:selector xpath="players/player" /&gt; &lt;xsd:field xpath="username" /&gt; &lt;/xsd:key&gt; &lt;/xsd:element&gt; &lt;/xsd:sequence&gt; &lt;/xsd:complexType&gt; &lt;/xsd:element&gt; </code></pre> <p>Note that this is only an exzerpt from the full code, but it shows all necessary information.</p> <p>XML</p> <pre><code>&lt;t:players&gt; &lt;t:player username="Super Mario"&gt; &lt;t:gender&gt;FEMALE&lt;/t:gender&gt; &lt;t:date-of-birth&gt;1995-11-29&lt;/t:date-of-birth&gt; &lt;/t:player&gt; &lt;t:player username="Super Mario"&gt; &lt;t:date-of-birth&gt;1991-10-12&lt;/t:date-of-birth&gt; &lt;t:gender&gt;MALE&lt;/t:gender&gt; &lt;/t:player&gt; &lt;/t:players&gt; </code></pre> <p><strong>PROBLEM:</strong></p> <p>As you can see I have created two players with both the name "Super Mario". Since the key should be unique this should throw and error, but xmllins does validate the files correctly</p> <p><strong>QUESTION:</strong></p> <p>How do I define the key correctly, that the elements are necessary to be unique.</p>
 

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