Re: machine consumable SPARQL grammar

On Tue, Oct 18, 2005 at 01:20:38PM +0100, Seaborne, Andy wrote:
> 
> 
> 
> Dan Connolly wrote:
> >So our grammar is now LL(1).
> >http://www.w3.org/2001/sw/DataAccess/rq23/#grammar
> >
> >But to directly consume the current draft (1.511 ) by machine,
> >I guess you have to copy and paste the table or something.
> >I think we have yacc and n-triples versions of the grammar.
> >Please add those to the draft, OK, EricP or Andy?
> 
> No problem.  It isn't just yacc anyway.
> 
> (N-triples?)

The N-triples-serializing code is probably a little fettid now.

> I'd also like to see that the generated parsers can in fact parse the test 
> suite syntax tests as a sanity check.

I have lexer probs with the python one (don't have the esaping right,
DanC, could you massage the .g file and tell me what escaping diffs
are required?). I periodically run the SyntaxTests through the perl
and C versions. Can do this again. Is now the time?

> >
> >i.e. check them into the rq23/ directory and add a link
> >from the #grammar section.
> >
> >In Andy's repy to the comment, there's a pointer to yacker,
> >and I can follow my nose from there to a list of grammars
> >  http://www.w3.org/2005/01/yacker?action=list+grammars
> >but it's not clear which is the relevant one.
> 
> This is true - Eric is there someway we can:
> 
> 1/ Delete unused grammars

In order to not get distracted by yaccer just now, I'll do this from
the command line. Are there any other than rq23final that you want to
save?

> 2/ Ensure all the generated parsers match the grammar.  At the moment, each 
> needs to be explicitly remade, right?  Flagging when the gramamr is newer 
> than one of the parsers and a "make all parsers" option woudl help.

This would require a bit of re-eng. Right now, the differen version
overright each other (not a great design).

> The grammar is rq23final (no "-") although that is prior to the change made 
> last week s/isURI/isIRI/g which changed the grammar in rq23 as well as all 
> the text use of isURI.
> 
> >
> >Is this relevant to life as we now know it?
> >  http://www.w3.org/2001/sw/DataAccess/rq23/grammar.yy
> >  grammar.yy,v 1.5 2004/11/28 08:28:39
> >
> >
> 
> 	Andy
> 

-- 
-eric

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