Hi all,
I have two ARQ ElementPathBlocks (or Basic Graph Pattern, see SPARQL spec
https://www.w3.org/TR/sparql11-query/#GraphPattern) and would like to know
whether they are equal ignoring variable names and ordering of the triples.
What is the best/easiest way to do that with the Apache Jena? I see there is an
org.apache.jena.sparql.util.Iso class that provides methods for testing
isomorphisms...but I'm unsure whether this is what I am looking for. I also
tested two ElementPathBlocks and using their equalTo method (which uses the Iso
class), but both variable names and order seems to matter judging them equal.
I'm guessing you mean not caring about the variable names but respecting
the shape they create in the BGP.
IsoMatcher is a simple algorithm for matching unordered lists
(Iso.isomorphic is ordered lists.)
If you want to ignore variables names you'll need a "EqualityTest" that
captures that
BNodeIso does this for bnodes. Modifying that for a Var->Var map loosk
possible (or converting the input BGPs to have a bnode with label
derived from the Variable name).
Andy
