Hello, this question is about the SPARQL specification.
A service description can include a property UnionDefaultGraph. I'm not
sure what it means. I have two possible interpretations:
1. If the default dataset of the service is {G0, (u1,G1), ..., (un,Gn)}
then it means that G0 is the union of G1,...,Gn.
2. If a query with a dataset description FROM a FROM b is sent to the
service then the default graph of the query dataset will be the union of
the graphs resulting of dereferencing a and b, i.e., the service does
not do the merge as it is stated in the SPARQL specification.
How I must interpret it?
Thanks!
Daniel
