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GATE is licensed under terms and conditions of the GNU Lesser General Public License (LGPL). The Free Software Foundation is a non-commercial organisation that has a long standard in providing Free software. The Free Software Foundation has two licenses available, the GNU General Public License (GPL) and the GNU Lesser GPL (LGPL). See also the Free Software Foundation's page on licenses. The main intention of the (L)GPL licenses is to make the software (and source code) available to everyone to use, while protecting the interests of the developers by putting restrictions on distribution of software incorporating the software. These licenses both use the copyleft mechanism to make sure that any redistributed derivative of the licensed software has to have a license compatible with the original one (in particular, enforcing making source code available). The difference between the GPL and the LGPL is that the LGPL allows commercial (or non-LGPL) programmes to link with the library (you still have to give credit and distribute the source), while the GPL forces any application using the software to be GPL'ed as well. This is done by requiring that any GPL program can only use other software components whose license is compatible with the GPL. However, note that a commercial application can still run a GPL'ed program, as long as it is clear it is used as a stand-alone product.

To have access to the source code and documentation, and to the online software documentation, you will have to accept the license conditions and to fill in a registration form. By doing this, you will be automatically registered to the gate-users mailing list which is meant to provide genuine user support between all subscribers of this mailing list. The membership of gate-users grants you access to the registered user area.

Summary

  • If you use GATE, you have to give credit to the OpenGATE Collaboration and to GATE.
  • You have at least to quote the following GATE reference paper in the reference list. The appropriate citation is: Jan S, Santin G, Strul D, Staelens S, Assie K, Autret D, Avner S, Barbier R, Bardies M, Bloomfield PM, Brasse D, Breton V, Bruyndonckx P, Buvat I, Chatziioannou AF, Choi Y, Chung YH, Comtat C, Donnarieix D, Ferrer L, Glick SJ, Groiselle CJ, Guez D, Honore PF, Kerhoas-Cavata S, Kirov AS, Kohli V, Koole M, Krieguer M, van der Laan DJ, Lamare F, Largeron G, Lartizien C, Lazaro D, Maas MC, Maigne L, Mayet F, Melot F, Merheb C, Pennacchio E, Perez J, Pietrzyk U, Rannou FR, Rey M, Schaart DR, Schmidtlein CR, Simon L, Song TY, Vieira JM, Visvikis D, Van de Walle R, Wieers E, Morel C. GATE: a simulation toolkit for PET and SPECT. Phys. Med. Biol. 49 (2004) 4543-4561
  • If you distribute an application that links with GATE (which you potentially modified), you have to distribute the (modified) source code of GATE as well, protected under the LGPL. See section 6 of the LGPL for full details.

Warranty

The LGPL disclaims all warranty.

Registration

If you want to register, you have now to read carefully the text of the GNU Lesser GPL.