base package:swish
base to use rather than file name
Set (or clear) the base URI.
Change (or remove) the base URI.
Compare language tags using the Language-range specification in
section 2.5 of RFC 3066.
True is returned if the comparison tag is the same as, or
matches a prefix of, the base tag (where the match must be over
complete sub tags).
Note that
l1 `isBaseLang` l2 == l2 `isBaseLang` l1
only when
l1 == l2