The Free Software Foundation Wednesday released the penultimate draft of its planned third version of a popular license for free and open-source software, the GNU general public license (GPL).

Created by Richard Stallman in 1989 for the GNU free operating system project, the GPL was last fully revised 16 years ago. The license gives users the right to freely study, copy, modify, reuse, share and redistribute software.

The FSF issued a first draft of GPLv3 in January 2006, followed by a second draft with noticeably more restrained language in July. The plan had been to bring out a third and final draft in October or November, but then Microsoft Corp. and Novell Inc. announced a surprise partnership around Novell's Suse Linux including a patent cross-licensing agreement. Parts of the Linux operating system including its kernel are licensed under GPL version 2.

Stallman, president of the FSF and the principal author of the GPL, said Wednesday that the patent agreement between Microsoft and Novell aims to undermine the user software freedoms enshrined in the license. "In this draft we have worked hard to prevent such deals from making a mockery of free software," he said in a written statement.

The new GPLv3 draft notes that the full details of the agreement between Microsoft and Novell have yet to be disclosed, but adds: "It is a matter of public knowledge, however, that the arrangement calls for Novell to pay a portion of the future gross revenue of one of its divisions to Microsoft, and that (as one feature of a complex arrangement) Microsoft has promised Novell's customers not to bring patent infringement actions against certain specific copies of Novell's Suse 'Linux' Enterprise Server product for which Novell receives revenue from the user, so long as the user does not make or distribute additional copies of the SLES."

This arrangement makes the free software "basically proprietary," according to the draft. So far, the FSF hasn't noted any adverse effects on users. "We take the threat seriously, and we have decided to act to block such threats, and to reduce their potential to do harm," the draft states. "Such deals also offer patent holders a crack through which to split the community. Offering commercial users the chance to buy limited promises of patent safety in effect invites each of them to make a separate peace with patent aggressors, and abandon the rest of our community to its fate." The draft's authors also worry that if enough users succumb to those tactics, a vendor might eventually be able to"terrify noncommercial developers into abandoning the software entirely."

The IDG News Service is a Network World affiliate.