[open-linguistics] Question: replacing language codes in a SPARQL BIND statement?

[John McCrae]

As far as I know there is no provision in SPARQL for querying ignoring the
language literal. In RDF at least "cat", "cat"@en and "cat"@en-GB are all
different values. Perhaps you could ask this question on a list like
public-lod at w3.org or semantic-web at w3.org?

Regards,
John

On Sun, Mar 13, 2016 at 11:09 AM, Christian Chiarcos <
chiarcos at informatik.uni-frankfurt.de> wrote:

> Dear all,
>
> this is a general technical question, albeit one specific to working with
> multilinguality issues in multiple lemon/ontolex dictionaries, hence I'm
> asking here in the first place.
>
> Imagine the following situation: I use the Russian DBnary (provided in a
> slightly extended variant of the old lemon) and an ontolex dictionary for
> Chalkan (with Russian glosses). Both provided by third parties, and I do
> not want to manipulate the data prior to querying. Now, I want to use
> DBnary to retrieve an English gloss for the Chalkan words in a single
> SPARQL query.
>
> If both dictionaries use the same xml:lang representation, this works
> rather well (I skip the query for reasons of brevity): I bind the Russian
> gloss from the Chalkan dictionary to variable ?ru and start searching
> DBnary for a data property that assigns ?ru as literal.
>
> It is more complicated, though, if both files use different language
> codes, e.g., ISO-639-3 (rus) and ISO-639-2 (ru) for Russian, or if a
> language code with region sub-tag is used (e.g., ru-RU). Is there any way
> to use, say, BIND to bind the string value of ?ru to a new variable which
> uses ISO-639-2 codes instead of the original ISO-639-3 (resp.
> ISO-639-2+ISO-3166) code?
>
> At the moment, I see only one way to solve this problem, i.e., using
> FILTER, str() and a string comparison of both variables. This should be
> fairly inefficient, though, as I presume the FILTER is applied only after
> all potential bindings for both variables for Russian terms have been
> determined.
>
> Am I overlooking anything?
>
> Best,
> Christian
> --
> Prof. Dr. Christian Chiarcos
> Applied Computational Linguistics
> Johann Wolfgang Goethe Universität Frankfurt a. M.
> 60054 Frankfurt am Main, Germany
>
> office: Robert-Mayer-Str. 10, #401b
> mail: chiarcos at informatik.uni-frankfurt.de
> web: http://acoli.cs.uni-frankfurt.de
> tel: +49-(0)69-798-22463
> fax: +49-(0)69-798-28931
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