Add support for SPARQL 1.2

[MathiasVDA]

See also rdfjs#43

[MathiasVDA]

This is probably to be done in codemirror

[MathiasVDA]

I'm stuck with executing the swipl. The old Prolog file seems to be incompatible with the latest swipl version. Need to try an older version or different environment. Need to learn prolog as well :)

[MathiasVDA]

This is probably to be done in codemirror

No, it's part of yasqe:
https://github.com/Matdata-eu/Yasgui/tree/main/packages/yasqe/grammar

(although it might be interesting to port back the grammer into codemirror so other projects can enjoy the benefits)

[MathiasVDA]

@rubenworks @jitsedesmet I would appreciate some tips on how to implement Traqula into Yasgui

[rubensworks]

There are plans for a new version of YASGUI, but things are still under discussion as to what it will look like, so no ETA yet. It will likely be placed under the https://github.com/rdfjs/ organization.

[MathiasVDA]

@rubensworks Well feel free to use or get inspiration from how I improved it here. In any case, If your offer from the zazuko fork still stands, I wouldn't mind getting a few tips on how to implement Traqula.

[jitsedesmet]

Hi, so Traqula implements a parser from a SPARQL 1.1 or 1.2 query string into an AST, and into Algebra. I have not looked into what data structure Yasgui requires, but you could look into whether you can transform Traqula's AST or Algebra into whatever structure Yasgui expects. Traqula is built on top of Chevrotain which should allow fault-tolerant parsing.

The plans Ruben talks about are still in early stages, as we are currently exploring our own expectations and plans for this line of work. If you have concrete questions related to Traqula's internals, I'll be happy to help.

[MathiasVDA]

Thanks @jitsedesmet, I didn't knew about the plans for a new Yasgui. Else it would have made more sense to join forces. In any case, I've been continuously adding new features and improvements to the fork in this repo (which is still MIT licensed so everyone can use, change, implement and generally do whatever they want with my work).

Yasgui currently starts from a prolog set of rules which are translated with swipl into javascript. I had hoped for something more readily made in Traqula. Query in, and 'line # with error' out :)

I haven't been successful yet in replicating the old grammar from the prolog rules file. I'll try again later. Once that's OK I can start editing the ruleset to include sparql 1.2 grammar (and fix some other issues with the 1.1 grammar)

[MathiasVDA]

Instead of reusing the existing language syntax checker, it might be another idea to implement a language server, for instance: https://github.com/IoannisNezis/Qlue-ls