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Re: [DTB] ACTIONs 428 and 292 completed

From: Michael Kifer <kifer@cs.sunysb.edu>
Date: Wed, 16 Apr 2008 23:53:04 -0400
To: Axel Polleres <axel.polleres@deri.org>
Cc: "Public-Rif-Wg (E-mail)" <public-rif-wg@w3.org>
Message-ID: <15276.1208404384@cs.sunysb.edu>


> Michael Kifer wrote:
> > One more comment. All names of the builtins must belong to some symbol
> > space. So, the proper naming would be something like
> > 
> > "pred:isLong"^^rif:iri
> > 
> > rather than pred:isLong.
> 
> The first sentence in the  namespace section explains that this is 
> exactly how I use prefixed abbreviations here. The long version is 
> highly unreadable.

Well, I read the first sentence but not the second, since I assumed that
you just copied it from FLD. But the first and the second sentences
contradict each other. The first says that : means the same as in BLD and
FLD, but the second says something quite different.

Worse yet, this second statement is wrong and not well-founded. According
to it, xsd:string expands into "....string"^^rif:iri and then rif:iri
should be expanded into "....iri"^^rif:iri, and so on.

Do not play with macros -- they expand faster than fire.

Furthermore, it is not a good idea to use one convention in one document
and another in a different document.

> > See, for example, Example 2 in
> > http://www.w3.org/2005/rules/wiki/BLD#EBNF_for_the_RIF-BLD_Rule_Language
> 
> 
> 
> > Alternatively, we could allocate a separate symbol space to the
> > builtins. In this case, they would look something like
> 
> I did suggest separatee symbol spaces some time ago in an ealier mail, 
> resp it was like that on the syntax proposals... with the addition that 
> - if we have a separate symbol space - why then do we need a keyword 
> "External"?
>   If we had separate symbol spaces, I think this sufficiently designates 
> builtins syntactically.

External is not just for builtins.


	--michael  


> > "isLong"^^rif:predicate 
> > 
> > 
> > 	--michael  
> > 
> >> DTB is ready for review, slightly delayed:
> >>
> >> http://www.w3.org/2005/rules/wiki/DTB
> >>
> >> At least, it should be - although not officially part of the published 
> >> working drafts in this round - be stablilized to comply mostly with the 
> >> definitions in FLD and BLD concerning external schemas.
> >>
> >> This also completes ACTION-292
> >> "Put links for each builtin to Xquery source URI"
> >>
> >> best,
> >> Axel
> 
> 
> -- 
> Dr. Axel Polleres, Digital Enterprise Research Institute (DERI)
> email: axel.polleres@deri.org  url: http://www.polleres.net/
> 
> rdfs:Resource owl:differentFrom xsd:anyURI .
> 
> 
Received on Thursday, 17 April 2008 03:53:42 GMT

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