postgresql 7.5.21 (i386 binary) in ubuntu edgy

 This is a transitional package to automatically migrate to the new
 multicluster/multiversion structure provided by postgresql-common and
 postgresql-<version>. On installation it will integrate the existing
 database into this new structure. You can safely remove this package
 afterwards.
 .
 The various procedural languages (PL/Python, PL/Tcl, PL/Perl) have
 now been split out to separate packages. If you use any of these
 languages, you need to install these packages as well.
 .
 PostgreSQL is a fully featured object-relational database management
 system. It supports a large part of the SQL standard and is designed
 to be extensible by users in many aspects. Some of the features are:
 ACID transactions, foreign keys, views, sequences, subqueries,
 triggers, user-defined types and functions, outer joins, multiversion
 concurrency control. Graphical user interfaces and bindings for many
 programming languages are available as well.