Support @language in term definitions

[niklasl]

If someone defines a term in the context and uses @language, should this lock (or clear) the @language for this term, effectively overriding any global @language defined in the context?

For example, given:

{
  "@context": {
    "@language": "en",
    "title": {"@id": "http://example.org/def#title"},
    "title_sv": {"@id": "http://example.org/def#title", "@language": "sv"},
    "name": {"@id": "http://example.org/def#name", "@language": null}
  },
  "@id": "http://example.org/somebody#self",
  "title": "Mister",
  "title_sv": "Herr",
  "name": "Some Body"
}

This could produce:

@prefix : <http://example.org/def#> .

<http://example.org/somebody#self>
  :title "Mister"@en, "Herr"@sv;
  :name "Some Body" .

[lanthaler]

Actually I assumed we already support this.. a big +1 from my side

[osma]

+1. This would make JSON-LD actually usable for JSON APIs which provide the same information in multiple languages.

As an example, the Helsinki Service Map REST API provides e.g. titles and street addresses in three languages, e.g. http://www.hel.fi/palvelukarttaws/rest/v2/organization/91 (JSON response uses the fields name_fi, name_sv and name_en). With the current spec, it would be quite cumbersome to map these to a single RDF property (e.g. rdfs:label or skos:prefLabel) with values having different language tags. The only way to do it currently is to use the long format for internationalized strings, which would be a significant departure from the current simple JSON format.

[lanthaler]

RESOLVED: Support the use of @language in term definitions to specify the associated @language for the term. If both @type and @language are specified, @language is ignored.

RESOLVED: If @language is specified at the top-level of a @context, then it applies to all native strings that would be interpreted as plain literals in the JSON-LD body. The @language can be overridden in term definitions by specifying a different @language value, including @language: null, or by specifying a @type for the term.