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POXML Schema Children With the Same Element
 

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  1. POXML Schema Children With the Same Element
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    <p>I am trying to write an XML schema for a server that accepts images. The images should either all have a mask or none should. </p> <p>I would like to produce an XML like this:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;FIVR&gt; &lt;meal&gt; &lt;media&gt; &lt;image2D filename="filename1"&gt; &lt;mask filename="filename1" /&gt; &lt;/image2D&gt; &lt;image2D filename="filename2"&gt; &lt;mask filename="filename1" /&gt; &lt;/image2D&gt; &lt;image2D filename="filename3"&gt; &lt;mask filename="filename1" /&gt; &lt;/image2D&gt; &lt;image2D filename="filename4"&gt; &lt;mask filename="filename1" /&gt; &lt;/image2D&gt; &lt;image2D filename="filename5"&gt; &lt;mask filename="filename1" /&gt; &lt;/image2D&gt; &lt;/media&gt; &lt;/meal&gt; &lt;/FIVR&gt; </code></pre> <p>or </p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;FIVR&gt; &lt;meal&gt; &lt;media&gt; &lt;image2D filename="filename1"&gt; &lt;/image2D&gt; &lt;image2D filename="filename2"&gt; &lt;/image2D&gt; &lt;image2D filename="filename3"&gt; &lt;/image2D&gt; &lt;image2D filename="filename4"&gt; &lt;/image2D&gt; &lt;image2D filename="filename5"&gt; &lt;/image2D&gt; &lt;/media&gt; &lt;/meal&gt; &lt;/FIVR&gt; </code></pre> <p>But if some image2D elements have a mask child element but others dont, validation should fail. E.g the following should be rejected:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;FIVR&gt; &lt;meal&gt; &lt;media&gt; &lt;image2D filename="filename1"&gt; &lt;/image2D&gt; &lt;image2D filename="filename2"&gt; &lt;mask filename="filename1" /&gt; &lt;/image2D&gt; &lt;image2D filename="filename3"&gt; &lt;mask filename="filename1" /&gt; &lt;/image2D&gt; &lt;image2D filename="filename4"&gt; &lt;/image2D&gt; &lt;image2D filename="filename5"&gt; &lt;/image2D&gt; &lt;/media&gt; &lt;/meal&gt; &lt;/FIVR&gt; </code></pre> <p>Can I express this using an XSD schema?</p> <p>The schema I have right now looks like this:</p> <pre><code>&lt;xs:element name="FIVR"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element name="meal" minOccurs="1" maxOccurs="1"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element name="media" minOccurs="1" maxOccurs="1"&gt; &lt;xs:complexType&gt; &lt;xs:choice&gt; &lt;xs:element name="image2D" minOccurs="5" maxOccurs="5" &gt; &lt;xs:complexType&gt; &lt;xs:all minOccurs="0"&gt; &lt;xs:element name="mask"&gt; &lt;xs:complexType&gt; &lt;xs:attribute name="filename" type="xs:string" use="required"/&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:all&gt; &lt;xs:attribute name="filename" type="xs:string" use="required"/&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:choice&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:sequence&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:sequence&gt; &lt;/xs:complexType&gt; </code></pre> <p></p>
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    1. USMax Ehrlich
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