MINUS (test "Subtraction with MINUS from a fully bound minuend")
Working through the SPARQL 1.1 testcases for ClioPatria, I'm struggling
This seems to boil down to what do to with optional bindings (NULL) in
arguments. If I treat them to match everything, I get no results. If
to match only another NULL, I also get ?a = :a2. Can anyone explain
what I am
Also related to MINUS: 8.2 talks about two arguments, the left-side and the
right-side. It isn't very clear on what the left-side argument actually is.
I now consider this to be the query as far as it is collected up to now in
the current GroupGraphPattern. Is this right?
Thanks --- Jan
P.s. Surely I'll be more often confused by the specs or test cases. Is
this the right forum or should I use another list?