LICENSE

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                     PUBLIC DOMAIN NOTICE
         National Center for Biotechnology Information

This software is a "United States Government Work" under the terms of
the United States Copyright Act.  It was written as part of the
authors' official duties as United States Government employees and
thus cannot be copyrighted.  This software is freely available to the
public for use. The National Library of Medicine and the
U.S. Government have not placed any restriction on its use or
reproduction.

Although all reasonable efforts have been taken to ensure the accuracy
and reliability of the software and data, the NLM and the U.S.
Government do not and cannot warrant the performance or results that
may be obtained by using this software or data. The NLM and the U.S.
Government disclaim all warranties, express or implied, including
warranties of performance, merchantability or fitness for any
particular purpose.

Please cite the authors in any work or product based on this material.

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Copyright F.A.Q.

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Q. Our product makes use of the NCBI source code, and we made changes
   and additions to that version of the NCBI code to better fit it to
   our needs. Can we copyright the code, and how?

A. You can copyright only the *changes* or the *additions* you made to
   the NCBI source code. You should identify unambiguously those
   sections of the code that were modified, e.g. by commenting any
   changes you made in the code you distribute. Therefore, your
   license has to make clear to users that your product is a
   combination of code that is public domain within the U.S. (but may
   be subject to copyright by the U.S. in foreign countries) and code
   that has been created or modified by you.

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Q. Can we (re)license all or part of the NCBI source code?

A. No, you cannot license or relicense the source code written by NCBI
   since you cannot claim any copyright in the software that was
   developed at NCBI as a 'government work' and consequently is in the
   public domain within the U.S.

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