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    copied!<p>The schema....</p> <pre><code>&lt;?xml version="1.0"?&gt; &lt;xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"&gt; &lt;xsd:element name="Segment"&gt; &lt;xsd:complexType&gt; &lt;xsd:sequence&gt; &lt;xsd:element name="Subsegment" minOccurs="1" maxOccurs="unbounded" type="SubsegmentType"/&gt; &lt;/xsd:sequence&gt; &lt;/xsd:complexType&gt; &lt;/xsd:element&gt; &lt;xsd:complexType name="SubsegmentType"&gt; &lt;xsd:simpleContent&gt; &lt;xsd:extension base="xsd:string"&gt; &lt;xsd:attribute name="target" type="xsd:string"/&gt; &lt;/xsd:extension&gt; &lt;/xsd:simpleContent&gt; &lt;/xsd:complexType&gt; &lt;/xsd:schema&gt; </code></pre> <p>And the results using xmllint....</p> <pre><code>xmllint testfile.xml --schema Subsegment.xsd &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;Segment&gt; &lt;Subsegment target="all"&gt;This is test 1&lt;/Subsegment&gt; &lt;Subsegment target="some"&gt;This is test 2&lt;/Subsegment&gt; &lt;/Segment&gt; testfile.xml validates </code></pre> <p>Let's add some errors to verify...</p> <p><strong>Using an unspecified element</strong></p> <pre><code>xmllint badtestfile.xml --schema Subsegment.xsd &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;Segment&gt; &lt;Something-Else/&gt; &lt;Subsegment target="all"&gt;This is test 1&lt;/Subsegment&gt; &lt;Subsegment target="some"&gt;This is test 2&lt;/Subsegment&gt; &lt;/Segment&gt; badtestfile.xml:3: element Something-Else: Schemas validity error : Element 'Something-Else': This element is not expected. Expected is ( Subsegment ). badtestfile.xml fails to validate </code></pre> <p><strong>Using an invalid attribute</strong></p> <pre><code>xmllint badtestfile.xml --schema Subsegment.xsd &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;Segment&gt; &lt;Subsegment mytarget="all"&gt;This is test 1&lt;/Subsegment&gt; &lt;Subsegment target="some"&gt;This is test 2&lt;/Subsegment&gt; &lt;/Segment&gt; badtestfile.xml:3: element Subsegment: Schemas validity error : Element 'Subsegment', attribute 'mytarget': The attribute 'mytarget' is not allowed. badtestfile.xml fails to validate </code></pre>
 

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