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    copied!<p>I want to comment that the script in current accepted answer doesn't validate errors about incorrect orders of elements of <code>xs:sequence</code>. For example: test.xml</p> <pre><code>&lt;addresses xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation='test.xsd'&gt; &lt;address&gt; &lt;street&gt;Baker street 5&lt;/street&gt; &lt;name&gt;Joe Tester&lt;/name&gt; &lt;/address&gt; &lt;/addresses&gt; </code></pre> <p>test.xsd</p> <pre><code>&lt;xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema'&gt; &lt;xs:element name="addresses"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element ref="address" minOccurs='1' maxOccurs='unbounded'/&gt; &lt;/xs:sequence&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;xs:element name="address"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element ref="name" minOccurs='0' maxOccurs='1'/&gt; &lt;xs:element ref="street" minOccurs='0' maxOccurs='1'/&gt; &lt;/xs:sequence&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;xs:element name="name" type='xs:string'/&gt; &lt;xs:element name="street" type='xs:string'/&gt; &lt;/xs:schema&gt; </code></pre> <p>I wrote another version that can report this error:</p> <pre><code>function Test-XmlFile { &lt;# .Synopsis Validates an xml file against an xml schema file. .Example PS&gt; dir *.xml | Test-XmlFile schema.xsd #&gt; [CmdletBinding()] param ( [Parameter(Mandatory=$true)] [string] $SchemaFile, [Parameter(ValueFromPipeline=$true, Mandatory=$true, ValueFromPipelineByPropertyName=$true)] [alias('Fullname')] [string] $XmlFile, [scriptblock] $ValidationEventHandler = { Write-Error $args[1].Exception } ) begin { $schemaReader = New-Object System.Xml.XmlTextReader $SchemaFile $schema = [System.Xml.Schema.XmlSchema]::Read($schemaReader, $ValidationEventHandler) } process { $ret = $true try { $xml = New-Object System.Xml.XmlDocument $xml.Schemas.Add($schema) | Out-Null $xml.Load($XmlFile) $xml.Validate({ throw ([PsCustomObject] @{ SchemaFile = $SchemaFile XmlFile = $XmlFile Exception = $args[1].Exception }) }) } catch { Write-Error $_ $ret = $false } $ret } end { $schemaReader.Close() } } </code></pre> <p>PS C:\temp\lab-xml-validation> dir test.xml | Test-XmlFile test.xsd</p> <pre><code>System.Xml.Schema.XmlSchemaValidationException: The element 'address' has invalid child element 'name'. ... </code></pre>
 

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