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Use of IRIs and CURIEs as @context keys (ISSUE #43)

From: Gregg Kellogg <gregg@kellogg-assoc.com>
Date: Tue, 29 Nov 2011 14:37:54 -0500
To: Linked JSON <public-linked-json@w3.org>
Message-ID: <3ACAA650-35BD-4968-B6E9-27AAD42B2064@greggkellogg.net>
In response to an action item, I created issue #43: https://github.com/json-ld/json-ld.org/issues/43.

> In today's telco (http://json-ld.org/minutes/2011-11-29/) we discussed using using CURIEs in the key position within an@context object to describe @datatype coercion rules. This needs comes about because of the desire to fully utilize JSON-LD compact form in a generic RDF transformation without requiring a processor to automatically create term definitions. For example, consider the following expressed in Turtle:
> @prefix foaf: <http://xmlns.com/foaf/0.1/> .
> @prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
> <http://greggkellogg.net/foaf#me> a foaf:Person;
>   foaf:name "Gregg Kellogg";
>   foaf:homepage <http://greggkellogg.net/>;
>   foaf:birthday "1957-02-27"^^xsd:date .
> I would like to be able to take advantage of the foaf:birthday range datatype in a JSON-LD representation; if the processor must automatically create a prefix (say, "foaf_birthday") there is some risk with colliding with a definition in another context. The rule would be that if the key is an NCName, it is taken as a term definition, otherwise normal IRI expansion rules apply. Allowing a CURIE to be used in the key position, could allow something such as the following:
> {
>   "@context": {
>     "xsd": "http://www.w3.org/2001/XMLSchema#",
>     "foaf": "http://xmlns.com/foaf/0.1/",
>     "foaf:birthday": {"@coerce": "xsd:date"}
>   },
>   "@subject": "http://greggkellogg.net/foaf#me",
>   "@type": "foaf:Person",
>   "foaf:name": "Gregg Kellogg",
>   "foaf:birthday": "1957-02-27",
>   "foaf:homepage": "http://greggkellogg.net/"
> }
> This was also briefly discussed on the mailing list:
> http://lists.w3.org/Archives/Public/public-linked-json/2011Nov/0041.html

Received on Tuesday, 29 November 2011 19:39:04 UTC

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