[xml] Problems using xpath with namespaces

["Pedro Rocha" <pedro_jrocha hotmail com>]

Hello,

I?ve got the following c++ function (I've removed all the error checking):

long EvaluateXPathExpression (char * FileName, xmlChar * XPathExpression)
{
        xmlXPathContextPtr XPathContext;
        xmlXPathObjectPtr XPathObject;

        // Parse the file.
        xmlDocPtr XMLDocumentPtr = xmlParseFile (FileName);

        // Initialize the xpath context.
        XPathContext = xmlXPathNewContext (XMLDocumentPtr);

        // Register all the doc namespaces.
        char nameSpace1[] = "http://schemas.xmlsoap.org/soap/envelope/";;
        char nameSpace1_prefix[] = "soapenv";
	char nameSpace2[] = 
"http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-5-MM7-1-2";;
	xmlXPathRegisterNs (XPathContext, (xmlChar*)nameSpace1_prefix, 
(xmlChar*)nameSpace1);
        xmlXPathRegisterNs (XPathContext, (xmlChar*)"", (xmlChar*)nameSpace2);

        // Eval xpath expression.
        XPathObject = xmlXPathEvalExpression (XPathExpression, XPathContext);

        return 0;
}

And the following xml file:

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";>
     <soapenv:Body>
           <SubmitReq 
xmlns="http://www.3gpp.org/ftp/Specs/archive/23_series/23.140/schema/REL-5-MM7-1-2";>
                 <MM7Version>5.3.0</MM7Version>
           </SubmitReq>
     </soapenv:Body>
</soapenv:Envelope>

If I execute EvaluateXPathExpression("filename.xml", "//SubmitReq"), the 
xpath evaluation returns no results (XPathObject->nodesetval->nodeTab is 
NULL).

Any hints?

Many thanks,

Pedro

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