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From afs <>
Subject [GitHub] commons-rdf issue #30: COMMONSRDF-51 language tags compared lower case
Date Mon, 16 Jan 2017 22:14:51 GMT
Github user afs commented on the issue:
    @ansell mentions one of the reasons the wording for RDF 1.1is not so direct - RDF 1.0
did not sanction the common normalization defined in BCP47 canonicalization, although that
actually requires consulting the registry as well.
    Jena is lax by default, and retains the form as originally written. In practice, datasets
seem to be internally consistent, all lower case or all syntax-canonical. 
    Variations of case are different nodes in the general case but are `Node.sameValue` (compare)
and cause matching in graph.find. Some storage layers may differ and canonicalize the form,
in order to index.

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