usage of vargen in template expansion

[d0rg0ld]

Using the following simple PROV template

document
        prefix var <http://openprovenance.org/var#>
        prefix vargen <http://openprovenance.org/vargen#>
        prefix ex <http://example.com#>
        bundle ex:b
                agent(var:measuringAgent,[prov:type = 'prov:Person'])
                entity(vargen:measurement, [prov:type="measurement"])
                activity(var:measuringActivity,[prov:location = 'var:tree'])
                wasAssociatedWith(vargen:assocId; var:measuringActivity, var:measuringAgent,-)
                wasGeneratedBy(vargen:measurement,var:measuringActivity,-)
        endBundle
endDocument

with these bindings

@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix tmpl: <http://openprovenance.org/tmpl#> .
@prefix var: <http://openprovenance.org/var#> .
@prefix ex: <http://example.com#> .

var:measuringAgent a prov:Entity ;
        tmpl:value_0 ex:forestWorker1 ;
        tmpl:value_1 ex:forestWorker2 .


var:tree a prov:Entity ;
        tmpl:2dvalue_0_0 ex:tree1 ;
        tmpl:2dvalue_1_0 ex:tree2 ;
        tmpl:2dvalue_2_0 ex:tree3 .

var:measuringActivity a prov:Entity ;
        tmpl:value_0 ex:measurement1 ;
        tmpl:value_1 ex:measurement2 ;
        tmpl:value_2 ex:measurement3 .

with provconvert results in the following expansion

document
bundle ex:b
prefix var <http://openprovenance.org/var#>
prefix ex <http://example.com#>
prefix uuid <urn:uuid:>

agent(ex:forestWorker1,[prov:type = 'prov:Person'])
agent(ex:forestWorker2,[prov:type = 'prov:Person'])
entity(uuid:95fc3d3a-f390-4a7d-9e83-ce3713259046,[prov:type = "measurement" %% xsd:string])
activity(ex:measurement1,-,-,[prov:location = 'ex:tree1'])
activity(ex:measurement2,-,-,[prov:location = 'ex:tree2'])
activity(ex:measurement3,-,-,[prov:location = 'ex:tree3'])
wasAssociatedWith(uuid:3aaa7767-be52-4c3b-a1c9-668dac8e2002;ex:measurement1,ex:forestWorker1,-)
wasAssociatedWith(uuid:3aaa7767-be52-4c3b-a1c9-668dac8e2002;ex:measurement2,ex:forestWorker1,-)
wasAssociatedWith(uuid:3aaa7767-be52-4c3b-a1c9-668dac8e2002;ex:measurement3,ex:forestWorker1,-)
wasAssociatedWith(uuid:3aaa7767-be52-4c3b-a1c9-668dac8e2002;ex:measurement1,ex:forestWorker2,-)
wasAssociatedWith(uuid:3aaa7767-be52-4c3b-a1c9-668dac8e2002;ex:measurement2,ex:forestWorker2,-)
wasAssociatedWith(uuid:3aaa7767-be52-4c3b-a1c9-668dac8e2002;ex:measurement3,ex:forestWorker2,-)
wasGeneratedBy(uuid:95fc3d3a-f390-4a7d-9e83-ce3713259046,ex:measurement1,-)
wasGeneratedBy(uuid:95fc3d3a-f390-4a7d-9e83-ce3713259046,ex:measurement2,-)
wasGeneratedBy(uuid:95fc3d3a-f390-4a7d-9e83-ce3713259046,ex:measurement3,-)
endBundle
endDocument

It seems that in both the association and the entity case, vargen creates one UUID per vargen variable, although expansion should - to my understanding - result in one UUID per expanded association/entity instance

Thanks,
Doron