Github user afs commented on the pull request:
https://github.com/apache/jena/pull/114#issuecomment-167763543
Main comment : the grammar changes haven't been put inside `#ifdef ARQ` so
they happen in strict SPARQL 1.1 as well as the extended ARQ language.
Keeping the SPARQL 1.1 parser exactly as the SPARQL 1.1 spec is important.
There should just be some noise changes and no more. (see for example the
construct-quad changes).
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