Re: Whitespace in Turtle after ^^

> On Jan 19, 2015, at 9:34 AM, Andy Seaborne <andy@apache.org> wrote:
> 
> On 19/01/15 17:19, Stian Soiland-Reyes wrote:
>> Thank you for enlightening me, both ;)
>> 
>> AllegroGraph & TopBraid Composer were reported to us to bark on this,
>> but it might be a side effect of another invalid localname ( ns0:api# )
>> which it rightly moaned about.
>> 
>> ..And Jena, but Andy just fixed it. Sorry for giving you more work,
>> Andy.. I guess you tested for that
>> 
>> <s> <p> "no space after @" @en .
> 
> is legal. The string part is misdirection!
> 
> "no space after @"@  en .
> 
> is illegal.

Indeed;  hard to believe Eric didn't cover this in his tests :) They're otherwise quite comprehensive.

For reasons such as this the RDFa test suite has been updated from time to time to add corner cases which were missing. It might be useful if we had a version of the various test suites in GitHub so that we could make them more living, and it would be easier to update implementation reports in the future.

BTW, I also have a more "universal" online test runner I've developed for the CSVW work, which could pretty easily handle the various RDF test manifests and invoke implementations available as a service. This proved to be quite useful for RDFa. In the absence of any other place to host this, I may just add it to my own endpoint.

Gregg

> 	Andy
> 
>> 
>> case as well.
>> 
>> On 19 Jan 2015 16:53, "Eric Prud'hommeaux" <eric@w3.org
>> <mailto:eric@w3.org>> wrote:
>> 
>>    * Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk
>>    <mailto:soiland-reyes@cs.manchester.ac.uk>> [2015-01-19 16:05+0000]
>>     > Hi, I somehow have come over some "evil" Turtle that seems to be
>>    on the form:
>>     >
>>     > <http://example.com/s2> <http://example.com/p> "false"^^
>>     > <http://www.w3.org/2001/XMLSchema#boolean> .
>>     >
>>     > (One word: PHP)
>>     >
>>     >
>>     > Now, as bad style as this might look - I could not figure out
>>    from the
>>     > RDF Turtle 1.1 grammar why it shouldn't be valid.
>> 
>>    What lead you to believe it was invalid? I've tried a few Turtle and
>>    SPARQL parsers ('cause they use the same productions) and they all
>>    accepted it. For example
>>    [[
>>    ASK { FILTER ("false"^^
>>    <http://www.w3.org/2001/XMLSchema#boolean>)
>>         }
>>    ]]
>>    passes <http://sparql.org/query-validator.html>.
>> 
>> 
>>     > http://www.w3.org/TR/turtle/#grammar-production-RDFLiteral
>>     >
>>     > [128s] RDFLiteral ::= String (LANGTAG | '^^' iri)?
>>     >
>>     > vs.
>>     >
>>     > [7] predicateObjectList ::= verb objectList (';' (verb objectList)?)*
>>     >
>>     >
>>     > We "all know" that whitespace is allowed around ; - and not around ^^
>>     > - yet I can't see this reflected in these rules. Perhaps my grammar
>>     > understanding is a bit rusty.
>>     >
>>     >
>>     > http://www.w3.org/TR/turtle/#sec-grammar-ws says:
>>     >
>>     > > White space (production WS) is used to separate two terminals
>>    which would otherwise be (mis-)recognized as one terminal. Rule
>>    names below in capitals indicate where white space is significant;
>>    these form a possible choice of terminals for constructing a Turtle
>>    parser.
>>     >
>>     > > White space is significant in the production String.
>>     >
>>     >
>>     > Neither RDFLiteral or predicateObjectList are listed under Terminals.
>>     >
>>     >
>>     > So there's a special WS production - but that's only used between [ ]
>>     > - e.g. so you can do
>>     >
>>     > [ a foaf:Person ]  #someone
>>     >   foaf:knows  # Someone (else?)
>>     >   [ a foaf:Person ] .
>>     >
>>     >
>>     >
>>     > String is
>>     >
>>     >
>>     > [17] String ::= STRING_LITERAL_QUOTE | STRING_LITERAL_SINGLE_QUOTE |
>>     > STRING_LITERAL_LONG_SINGLE_QUOTE | STRING_LITERAL_LONG_QUOTE
>>     >
>>     >
>>     >
>>     > Can anyone enlighten me?
>>     >
>>     >
>>     >
>>     > --
>>     > Stian Soiland-Reyes, myGrid team
>>     > School of Computer Science
>>     > The University of Manchester
>>     > http://soiland-reyes.com/stian/work/
>>    http://orcid.org/0000-0001-9842-9718
>>     >
>> 
>>    --
>>    -ericP
>> 
>>    office: +1.617.599.3509 <tel:%2B1.617.599.3509>
>>    mobile: +33.6.80.80.35.59 <tel:%2B33.6.80.80.35.59>
>> 
>>    (eric@w3.org <mailto:eric@w3.org>)
>>    Feel free to forward this message to any list for any purpose other than
>>    email address distribution.
>> 
>>    There are subtle nuances encoded in font variation and clever layout
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>> 
> 
>

Received on Monday, 19 January 2015 18:24:40 UTC