SPARQL EBNF?

[Nicholas Car]

Dear RDFlibbers,

Does anyone have either a plain EBNF grammar for SPARQL or a Lark Python grammar file for it?

I am trying to build up a canonical more modern PEG for SPARQL to perhaps slot in to RDFLib.

I see W3C EBNF SPARQL grammars out there, e.g. https://github.com/dundalek/GrammKit/blob/master/examples/sparql.ebnf, but not 'pure' EBNF and I can't find a Lark implementation.

If I really can't find one, I'm going to have to either convert the W3C EBNF to plain EBNF and use something like Tatsu (https://pypi.org/project/TatSu/) or convert straight to a Lark Python grammar and use Lark as I need a Python SPARQL grammar checker.

Any other suggestions for SPARQL grammar use in Python welcome!

Thanks, Nick

[Iwan Aucamp]

Hi Nic,

Not sure about the quality of these, and they are not exactly EBNF, but there is:

- https://github.com/antlr/grammars-v4/blob/master/sparql/Sparql.g4

- https://github.com/rollxx/antlr-sparql-grammar

They may be easy to convert to EBNF.

Iwan Aucamp

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