Bug in DOMDocument schemaValidate() function?

[Voß, Marko <Marko.Voss@xxxxxxxxxxxxxxxx>]

Hello,

I am validating user DOM against schema files using the following piece of code:

$valid = @$doc->schemaValidate($xsdFile);

where $doc is of type DOMDocument and $xsdFile is the file location of the XSD file.

Everything worked fine until the following validation occured:

A validation of a XML against the SRW/U schema (http://www.loc.gov/standards/sru/sru1-1archive/xml-files/srw-types.xsd) 
failed.

Here is the XML:

-----------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<srw:explainResponse xmlns:srw="http://www.loc.gov/zing/srw/"; xmlns:zr="http://explain.z3950.org/dtd/2.0/";>
   <srw:version>1.1</srw:version>
   <srw:record>
     <srw:recordSchema>http://explain.z3950.org/dtd/2.0/</srw:recordSchema>
     <srw:recordPacking>XML</srw:recordPacking>
     <srw:recordData>
       <zr:explain>
         <zr:serverInfo wsdl="http://myserver.com/db"; protocol="SRU" version="1.1">
           <host>myserver.com</host>
           <port>80</port>
           <database>sru</database>
         </zr:serverInfo>
         <zr:databaseInfo>
           <title lang="en" primary="true">SRU Test Database</title>
           <description lang="en" primary="true"> My server SRU Test Database</description>
         </zr:databaseInfo>
         <zr:metaInfo>
           <dateModified>27-11-2003</dateModified>
         </zr:metaInfo>
       </zr:explain>
     </srw:recordData>
   </srw:record>
</srw:explainResponse>
-----------------------------------------------------

This XML is valid. However, I keep getting the following libxml error:

object(LibXMLError)#192 (6) {
     ["level"]=>
     int(2)
     ["code"]=>
     int(1871)
     ["column"]=>
     int(0)
     ["message"]=>
     string(133) "Element '{http://www.loc.gov/zing/srw/}record': This element is not expected. Expected is ( 
{http://www.loc.gov/zing/srw/}version ).
"
     ["file"]=>
     string(0) ""
     ["line"]=>
     int(0)
}

I think, the validator is unable to handle the xsd:extension part of the schema:

<xsd:complexType name="explainResponseType">
   <xsd:complexContent>
     <xsd:extension base="responseType">
       <xsd:sequence><xsd:element ref="record"/>
         <xsd:element ref="echoedExplainRequest" minOccurs="0"/>
         <xsd:element ref="diagnostics" minOccurs="0"/>
         <xsd:element ref="extraResponseData" minOccurs="0"/>
       </xsd:sequence>
     </xsd:extension>
   </xsd:complexContent>
</xsd:complexType>

The version-element exists and is at the right place. If I add another version-element after the first one, it complains 
about expecting a record-element instead, which is correct. But it is not correct to expect another version-element 
after the already existing one.

Is this a bug? Or did I made a mistake somewhere and I am not able to see it right now?


Thank you for any help!

Best regards,
Marko


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