Accessing rdf:Bag information

[tedca77]

I am new to RDF - I am attempting to updated RDF from the XMP section of JPEG images. The information is within an Iptc4xmpExt:LocationCreated element and then within an rdf:RBag element.

When read in the XMP data looks like this (provided as an attribute):

<Iptc4xmpExt:LocationCreated>   
   <rdf:Bag> 
	<rdf:li Iptc4xmpExt:City="LC1-City"      
	Iptc4xmpExt:CountryCode="LC1"      
	Iptc4xmpExt:CountryName="LC1-Country Name"  
	Iptc4xmpExt:ProvinceState="LC1-State or Province"     
	Iptc4xmpExt:Sublocation="LC1-Sublocation"  
	Iptc4xmpExt:WorldRegion="LC1-World Region"/>    
  </rdf:Bag>     
</Iptc4xmpExt:LocationCreated>

Once read successfully into RDF4J - it looks like this:

<rdf:Description rdf:about="http://example.org/Image">
	<Iptc4xmpExt:LocationCreated rdf:nodeID="b6538c1ef06545b68aa38c4f65ce305c52"/>
</rdf:Description>

<rdf:Description rdf:nodeID="b6538c1ef06545b68aa38c4f65ce305c52">
	<rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Bag"/>
	<rdf:_1 rdf:nodeID="b6538c1ef06545b68aa38c4f65ce305c53"/>
</rdf:Description>

<rdf:Description rdf:nodeID="b6538c1ef06545b68aa38c4f65ce305c53">
	<Iptc4xmpExt:City>LC1-City</Iptc4xmpExt:City>
	<Iptc4xmpExt:CountryCode>LC1</Iptc4xmpExt:CountryCode>
	<Iptc4xmpExt:CountryName>LC1-Country Name</Iptc4xmpExt:CountryName>
	<Iptc4xmpExt:ProvinceState>LC1-State or Province</Iptc4xmpExt:ProvinceState>
	<Iptc4xmpExt:Sublocation>LC1-Sublocation</Iptc4xmpExt:Sublocation>
	<Iptc4xmpExt:WorldRegion>LC1-World Region</Iptc4xmpExt:WorldRegion>
</rdf:Description>

I am trying to filter a model to only hold the statements from node "b6538c1ef06545b68aa38c4f65ce305c53", which I can then update. I can find the NodeID which I am then filtering on Subject e.g. Resource rr1 = vf.createIRI("_:",nodeID). However the filter does not return any statements in bagModel1.

 //filter to LocationCreated
            Model iriFilter = model.filter(IRI_RESOURCE, IRI_LOCATIONCREATED, null);
            if(iriFilter.size()==0) {
                //to be completed
            }
            else
            {
                ValueFactory vf = SimpleValueFactory.getInstance();
                Resource node = objectResource(iriFilter).orElse(null);
                if(node != null) {
                    //Filter to RBAG
                    Collection<Statement> rdfBag= RDFContainers.getContainer(RDF.BAG,model, node, new ArrayList<Statement>());
                    for(Statement statement : rdfBag)
                    {
                        for(Statement listatement : rdfBag) {
                            Value ob = listatement.getObject();
                            String nodeID = ob.stringValue();
                            //need to find structure with object..
                            Resource rr1 = vf.createIRI("_:",nodeID);
                            Model bagModel1 = model.filter(rr1, null, null);
                            Rio.write(bagModel1, System.out, RDFFormat.RDFXML);
                        }
                    }
                }
            }

Is this the best approach is their an easier way of doing this ? I could not find any examples of this type of manipulation. Thanks for your help.