I believe that I have come across this before but I can't find my notes.

Q: is it true that DatasetFactory.creteMem() will return a dataset for which
dataset.getNamedModel("urn:x-arq:UnionGraph") will return a model but will
not contain a union of all the models in the dataset?

Q: is it true that TDBDataset.getNamedModel("urn:x-arq:UnionGraph") will
return a model that does contain the union of all dataset?

Q: is it true that the Model returned
by TDBDataset.getNamedModel("urn:x-arq:UnionGraph") will be updated as new
models are added to the dataset. (e.g.
TDBDataset ds;
Model m = ds..getNamedModel("urn:x-arq:UnionGraph");
ds.addNamedModel( "x", anotherModel );

// m will now contain the new data that is in "anotherModel".
)


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