Returns a list of known license references (in form of URIs). This is
useful for UIs to build a list of available licenses for tagging purposes
(e.g. to tag an audio track appropriately in a video or audio editor, or
an image in a camera application).
Get the jurisdiction code of a license. This is usually a two-letter
ISO 3166-1 alpha-2 code, but there is also the special case of Scotland,
for which no code exists and which is thus represented as “scotland”.