[Qexo-general] namespaces in xquery

[Víctor Torres Padrosa]

Hello,

 

I would be grateful if anyone could help me.

I'm using kawa-1.7.jar and it seems that it does not understand the namespace's declarations.

 

1- Given the following xml file (did.xml):

<?xml version="1.0" encoding="UTF-8"?>

<didl:DIDL>

<r:license xmlns:r="urn:mpeg:mpeg21:2003:01-REL-R-NS" xmlns:sx="urn:mpeg:mpeg21:2003:01-REL-SX-NS" xmlns:mx="urn:mpeg:mpeg21:2003:01-REL-MX-NS" xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">......</r:license>

.....

</didl:DIDL>

2- And the following query:

for $c in document("did.xml")
return  $c//*:license

3- I obtain the result:

<r:license>.....</r:license>

This result does not have the namespaces! Does anyone know how to keep them?

I would be also interested in extracting the namespace´s prefixes (r, sx, and mx) given their urn _expression_ (urn:mpeg:mpeg21:2003:01-REL-R-NS, urn:mpeg:mpeg21:2003:01-REL-SX-NS and urn:mpeg:mpeg21:2003:01-REL-MX-NS).

 

The function I'm using to evaluate the query is the following:

 

   public void evalLicenseQuery(String squery){
       XQuery xq=new XQuery();
       Object result=new Object();
  
       try{
            result=xq.eval(squery);
            File outputFile = new File("LicenseFile.xml");
            FileWriter out = new FileWriter(outputFile);
            XMLPrinter xp = new XMLPrinter(out);
            xp.writeObject(result);
            xp.println();
            xp.flush();
            

       }catch(java.lang.Throwable ex){
           System.out.println(ex.toString());
       }
   }

 

Thank you very much for your help!

 

Víctor