Main»Home Page

Home Page


BIOSEG is an implementation of a biological sequence interval/range type for PostgreSQL. A PostgreSQL GiST index is used to improve the speed of overlap, contains and contained-in queries

Installation instructions and documentation are in the README.


  • adds a PostgreSQL integer range type
  • fast querying of overlap, contains and contained-in queries
  • inter-base or 1-based coordinate system

See the bioseg usage page for examples.

BIOSEG has been tested with PostgreSQL 8.2 and 8.3


Releases are listed in the files section of the project pages.

The development code is available in a subversion repository at It can be checked out with this command:
  svn checkout svn:// bioseg