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CRF-OPT is released under GNU Free Public License;

Conditions of use for CRF-OPT:

In order to use the CRF-OPT package, or any of its constituent parts, a user must agree to abide by a set of conditions of use. The package is freely available for ``Academic'' use. ``Academic'' use of the package is defined to be use of the package under the following conditions. Any use of the package implies that these conditions have been understood, and that the user agrees to abide by all the listed conditions.

  • The CRF-OPT package and the CRF-OPT name are a copyright of the authors.

  • The package comes with no guarantee, expressed or implied, that it is suitable for any specific purpose nor that it is free of error. It should not be relied on as the basis to solve a problem whose incorrect solution could result in injury to person or property. If the package or any of its constituent parts is employed in such a manner, it is at the users' own risk and the authors disclaim all liability for such misuse.

  • The use of the package, or of any of its parts, in the production of military weapons is prohibited.

  • The package is distributed ``as is''. In particular, no maintenance, support, troubleshooting or subsequent upgrade is implied.

  • The use of CRF-OPT must be acknowledged, in any publication which contains results obtained with the package or any of its parts. A citation to the paper
    M. Chen, Y. Chen, M. Brent
    CRF-OPT: An Efficient High-Quality Conditional Random Field Solver
    Proc. 23rd AAAI Conference on Artificial Intelligence (AAAI-08), 2008
    is suitable

  • The package, or any modification thereof, may not be sold or supplied, nor embedded within other software products which are subsequently sold, or supplied, to a third party.

  • Users of the package are encouraged to send examples of the problems they have solved using the package to its authors. These examples may subsequently be passed into the public domain to allow others to test and compare new and existing software.

  • It is the responsibility of the licensee to ensure that each user of the package is aware of, and agrees to abide by, all the conditions given above.

Commercial use of CRF-OPT:

All inquiries about the commercial (i.e. non-''academic'') use of the CRF-OPT package or any of its parts should be addressed to:

  • Dr. Yixin Chen
    Washington University, Campus Box 1045
    One Brookings Drive, St. Louis, MO 63130, USA
    Email: chen@cse.wustl.edu