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POHow do I validate attribute names using XML Schema?
 

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  1. POHow do I validate attribute names using XML Schema?
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    <p>I'm trying to validate an XML file using an XSD schema, and I want to make certain that particular attributes are present using XmlReaderSettings and its ValidationEventHandler.</p> <p>Here's an example of what I'm trying to do. Each element has two attributes, "this" and "that". If one is missing or misspelled, I want to raise an exception. Currently, the ValidationEventHandler only raises an exception if the element name is invalid.</p> <p>XML file:</p> <pre><code>&lt;Addresses&gt; &lt;Address this="fu1" that="bar" /&gt; &lt;Address this="fu2" /&gt; &lt;Address thiss="fu3" that="bar" /&gt; &lt;/Addresses&gt; </code></pre> <p>XSD file:</p> <pre><code>&lt;?xml version="1.0" encoding="iso-8859-1" ?&gt; &lt;xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"&gt; &lt;xs:attribute name="this" type="xs:string"/&gt; &lt;xs:attribute name="that" type="xs:string"/&gt; &lt;xs:element name="Address"&gt; &lt;xs:complexType&gt; &lt;xs:attribute ref="this" use="required"&gt;&lt;/xs:attribute&gt; &lt;xs:attribute ref="that" use="required"&gt;&lt;/xs:attribute&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;xs:element name="Addresses"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element name="Address" maxOccurs="unbounded"&gt; &lt;/xs:element&gt; &lt;/xs:sequence&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; </code></pre> <p></p> <p>C# Code:</p> <pre><code>using System.Xml; using System.Xml.Schema; namespace test_validation { class Program { static void Main(string[] args) { string xsdpath = @"test.xsd"; string xmlpath = @"test.xml"; XmlReaderSettings settings = new XmlReaderSettings(); settings.Schemas.Add(null, xsdpath); settings.ValidationType = ValidationType.Schema; settings.ValidationEventHandler += new ValidationEventHandler(settingsValidationEventHandler); XmlReader reader = XmlReader.Create(xmlpath, settings); while (reader.Read()) { } } static void settingsValidationEventHandler(object sender, ValidationEventArgs e) { Console.WriteLine(e.Message); } } } </code></pre>
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    1. USishmael
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    1. COCheck out `xs:anyAttribute` which I believe allows you to specify whether "other" attributes are allowed.
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      1. POHow do I validate attribute names using XML Schema?
      1. USAlexei Levenkov
    2. COI'm afraid that doesn't help me, since that property only allows one to add extra attributes not originally defined in the xsd file. I'm trying to raise an error when an attribute is missing or misnamed.
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      1. POHow do I validate attribute names using XML Schema?
      1. USishmael
    3. COThe `xs:element` for Address inside Addresses does *not* reference the global `xs:element`. Is that a typo? As the schema is above you've not declared a type for Addresses/Address.
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      1. POHow do I validate attribute names using XML Schema?
      1. USSven
 

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