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Re: Re: basic-only langMatches test

From: Eric Prud'hommeaux <eric@w3.org>
Date: Sat, 11 Aug 2007 14:35:53 -0400
To: Lee Feigenbaum <lee@thefigtrees.net>
Cc: 'RDF Data Access Working Group' <public-rdf-dawg@w3.org>
Message-ID: <20070811183553.GS6273@w3.org>
* Lee Feigenbaum <lee@thefigtrees.net> [2007-08-10 18:05-0400]
> Seaborne, Andy wrote:
>> Eric Prud'hommeaux wrote:
>>> * Lee Feigenbaum <lee@thefigtrees.net> [2007-08-06 09:01-0400]
>>>> ACTION: ericP to write a test showing that langMatches doens't do 
>>>> extended matching
>>>
>>> I checked with i18n-core and it appears that there are no tests that
>>> basic matches but extended does not match.
>>>   http://www.w3.org/mid/46A62549.7010807@yahoo-inc.com
>>>
>>> I propose:
>>>
>>> http://www.w3.org/2001/sw/DataAccess/tests/data-r2/expr-builtin/manifest.ttl
>>>   LangMatches-basic
>>>
>>> Data:
>>> @prefix : <http://example.org/#> .
>>>
>>> :x :p3 "abc"@de .
>>> :x :p4 "abc"@de-DE .
>>> :x :p5 "abc"@de-Latn-DE .
>>>
>>> Query:
>>> PREFIX : <http://example.org/#>
>>>
>>> SELECT *
>>> { :x ?p ?v . FILTER langMatches(lang(?v), "de-DE") . }
>>>
>>> Results:
>>> ┌────────────────────────┬───────────┐
>>> │                       p│          v│
>>> ├────────────────────────┼───────────┤
>>> │<http://example.org/#p4>│"abc"@de-de│
>>> └────────────────────────┴───────────┘
>>>
>>> and i pass it...
>> ARQ does pass this test.
>
> Glitter does also, but...
>
>> The results do not reflect the syntactic input which has de-DE.  (ARQ 
>> actually returns "abc"@de-DE for ?v. -- all matching and equality is done 
>> case-insensitively but not by forcing to lower case on data loading.)
>> Had it been the JSON results, the results would be different.
>> As the point of the test is the FILTER, I suggest changing the results to
>> reflect the data and use @de-DE
>
> My test harness thinks I fail it because it does (incorrectly) case 
> sensitive comparisons. Could you make this change so that the results match 
> the case of the data, Eric?

I think it's best if i change the input data. It could be argued from
[[
Plain literals have a lexical form and optionally a language tag as
defined by [RFC-3066], normalized to lowercase.
]]
-- http://www.w3.org/TR/rdf-concepts/#section-Graph-Literal
that the normalization should go to LC. However, I don't want to
change, or even help, the world at this point. So let's just go
with lower case test data.

all "-DE" strings changed to "-de"
q-langMatches-de-DE.rq moved to q-langMatches-de-de.rq
manifest updated

> thanks,
> Lee

-- 
-eric

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Received on Saturday, 11 August 2007 18:35:58 GMT

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