W3C home > Mailing lists > Public > w3c-rdfcore-wg@w3.org > April 2002

Re: best way to write triples?

From: Pat Hayes <phayes@ai.uwf.edu>
Date: Thu, 18 Apr 2002 19:44:50 -0500
Message-Id: <p0510153bb8e516b9c0d6@[65.217.30.94]>
To: Dan Connolly <connolly@w3.org>
Cc: w3c-rdfcore-wg@w3.org
>
>We depend on eyeballs to get it right if we go
>this way. I don't like to do that. I like
>to have the machine help.
>
>>  Last time I looked, Ntriples syntax would have that as
>>
>>  <ex:Jenny> <ex:age> "10" .
>
>er... technicall, that's legal N-triples; but
><ex:Jenny> is a full URI reference; it's not an
>abbreviation for something longer. i.e.
>if you mean
>
>	<http://example/vocab#Jenny>
>
>then you have to write that in full.

I understand. No Qnames. I just wanted to get something that was the 
shortest syntactically legal example possible. I gather that the 
minimal requirement on a uriref is that it contain a colon, so that 
<a:b> is in fact a legal uriref, right? (I wouldn't expect Omniweb to 
know what to do with it.)

Hmm, how do we write things  like <xsd:number> properly, then??

>
>>  Jos writes them using an N3 variant:
>>
>>  ex:jenny ex:age "10" .
>>
>>  Maybe we should agree on a common publication format? If so, which is
>>  it? Guidance, anyone??
>
>If you can use real n-triples without it being
>unmanageably verbose, I suggest that.

I'll do that in examples, but use the XXX BBB CCC style for stating 
closure rules, how's that? The idea being to make it very obvious 
that these are intended to be stand-in meta-variables rather than 
actual RDF.

>Otherwise,
>I'm kinda partial to the "N3 variant."
>
>Note that n-triples doesn't have metasyntactic varables.
>i.e. no "if you see AAA BBB CCC. then include XXX BBB CCC."
>stuff. We don't have a formal notation for that sort
>of rule; don't confuse the reader into thinking that
>we do.

I was thinking of saying things like 'where XXX is any uriref and AAA 
is any literal', that kind of thing. These should only occur in 
tables of rules (and maybe in the proofs of the lemmas, but that's 
math in any case.)

Pat

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Received on Thursday, 18 April 2002 20:44:59 EDT

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