LanguageTag

A Language Tag is an abbreviated name for a natural language, such as fr for French or fr-CA for Canadian French. Language tags are used to identify the language of a Literal. Standard sets of language tags serve as a controlled vocabulary of identifiers for languages.

A value constraint of type “languageTag” is processed as a picklist of one or more language tags. Specifying language tags in this manner means that the value associated with the property (in the example below, with “:status”) is expected to be a string tagged with one of the language tags.

As with the value constraint type Picklist, a value constraint of type “LanguageTag” is split on whitespace unless another list separator has been defined (see section Configuration).

A string with no whitespace is parsed into a list with just one string. As the rules for well-formed language tags are quite complex, the module makes no attempt to check whether the language tags themselves are well-formed.

propertyID	valueConstraint	valueConstraintType
:status	fr	LanguageTag
:status	fr fr-CA	LanguageTag

This is interpreted as:

DCTAP instance
    Shape
        shapeID                  default
        Statement Template
            propertyID           :status
            valueConstraint      ['fr']
            valueConstraintType  languagetag
        Statement Template
            propertyID           :status
            valueConstraint      ['fr', 'fr-CA']
            valueConstraintType  languagetag