the value consists of a single token which may however
contain punctuation
characters, whitespace or word
separating characters. It need not be restricted to
numbers.
The value must conform to BCP 47. If the value is a
private use code (i.e., starts with x- or contains
-x-), a language element with a matching value for
its ident attribute should be supplied in the TEI
Header to document this value. Such documentation may also
optionally be supplied for non-private-use codes, though these
must remain consistent with their Unicode definitions.
<p> … The consequences of this rapid depopulation were the loss of the last <foreign xml:lang="rap">ariki</foreign> or chief (Routledge 1920:205,210) and their connections to ancestral territorial organization.</p>