Re: Calling listNameSpaces() and getNsPrefixMap() on Model

[Andy Seaborne]

It's fixed in the latest snapshot build:

https://repository.apache.org/content/repositories/snapshots/org/apache/jena/jena-tdb/0.10.2-SNAPSHOT/

It must be the recent build or later:

0.10.2-20130801.182026-64

or force refresh of SNAPSHOTs in maven.

        Andy

On 01/08/13 17:27, Charles Li wrote:

Thanks a lot, Andy! And awaiting the fix.

Thanks!
- Charles

On Aug 1, 2013, at 9:20 AM, Andy Seaborne <a...@apache.org> wrote:

On 01/08/13 16:44, Dave Reynolds wrote:

If you create a TDB model and read the file into it programatically then
the prefixes are stored and getNsPrefixMap will work.

I don't think tdbloader stores prefixes. Not sure if there's a flag to
control that.

It does not record prefixes - no flag either.

Recorded as:
https://issues.apache.org/jira/browse/JENA-496

and fix in progress (been meaning to fix this).

    Andy

Dave

On 01/08/13 16:12, Charles Li wrote:

The only difference is that I first used the TDB loader to load the
sampleRdfXML.xml into a directory, say <my_model_dir>. Then

model = TDBFactory.createDataset(my_model_dir).getDefaultModel() ;
System.err.println( m.getNsPrefixMap() );

And nothing printed out.




On Thu, Aug 1, 2013 at 9:56 AM, Chris Dollin
<chris.dol...@epimorphics.com>wrote:

On Thursday, August 01, 2013 09:23:46 AM Charles Li wrote:

I tried again using a very small RDF/XML file (attached). This RDF/XML

file

defined namespace alias at the very beginning. model.listNameSpaces()

gave

me all four actual namespaces without the alias. But getNsPrefixMap()

only

gave me an empty Map.

Hmm, works for me. Show (minimal, complete) code; mine's below.

Could this be a bug in getNsPrefixMap()?

Possible but unlikely: I would have expected it to show up much sooner
if so.


////////////////////////////////////////////////////////////////////////////////////


Code (using memory model):

package cmd;

import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.util.FileManager;

public class scog {

         public static void main( String [] args ) {
                 Model m = FileManager.get().loadModel(
"/home/chris/Documents/sampleRdfXML.xml" );
                 System.err.println( m.getNsPrefixMap() );
                 m.write( System.out, "TTL" );
         }
}

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