pg_collkey is a wrapper to use the collation
functions of the ICU library with a PostgreSQL
database server. Using this wrapper, you can
specify the desired locale for sorting UTF-8
strings directly in the SQL query, rather than
setting it during database installation. Default
Unicode collation (DUCET) is supported. You can
select whether punctuation should be a primary
collation attribute or not. The level of
comparison can be limited (in order to ignore
accents, for example). Numeric sequences of
strings can be recognized, so that 'test2' sorts
before 'test10'. This library is dependent on ICU.
