Microsoft plans to consolidate the licensing terms for its Shared Source initiative under three templates in an effort to simplify the programme for developers.
The new licenses aim to reduce complexity and provide developers with more predictable terms for viewing Microsoft's code, according to Jason Matusow, director of the company's Shared Source Initiative. The initiative provides a select group of partners and customers with limited access to Microsoft's source code.
As with the broader open-source community, Microsoft has seen the number of licences it uses increase. Microsoft currently has between 10 and 12 licences and it will not be completely retiring those as it moves toward the three-licence structure, he said.
Matusow made the announcement in a session ironically titled "Sharing the Love" at the O'Reilly European Open Source Convention in Amsterdam. Microsoft is frequently assailed by open-source advocates for being overly protective of its source code.
The three new licences are called the Microsoft Permissive License (Ms-PL), the Community License (Ms-CL) and the Reference License (Ms-RL). There will also be limited versions of the Permissive and Community licenses (Ms-LPL and Ms-LCL), Microsoft said. The company also released eight new Starter Kits for Visual Studio 2005, aimed at developers, under the new Permissive License.
As the open-source model becomes more commercialised it becomes more closed through licences designed to create value, Matusow said, adding that that's not necessarily a bad thing.
"So a service contract that says you can't modify source code isn't about being against open source," Matusow said. "It's about saying 'Hey, I want to be able to deliver to you additional value, and if I send you a patch automatically and you change the source code, it may blow up your computer.'"
"On the other hand, companies like Microsoft need to learn that openness can create commercial value," he said.
The Permissive License is the least restrictive, allowing developers to view, modify and redistribute source code for either commercial or noncommercial purposes. Source code can be changed and then relicensed before sharing it with others, according to the company,.
The Community License will be based on the Mozilla Public License, a file-by-file arrangement on reciprocal terms. If developers take a piece of code, manipulate and then redistribute it, they only have to contribute back material contained in that file, Matusow said.
"To us, that is a more commercially reasonable approach to the mechanism of reciprocal licensing," Matusow said.
The most restrictive, the Reference License, will allow people to view code only and not to modify it. Explanations of the three licenses can be found on the Microsoft website.
While some observers said Microsoft's announcement was broadly a positive one, what code the company will release under which licence remains to be seen, they said.
"Microsoft hasn't made it their policy to care about standards or standard ways of operating, so it will interesting to see if those are OSI approved," said Adam Leventhal, a Solaris kernel engineer at Sun Microsystems Inc. "It will also be interesting to see if OSI approves licences, which are essentially identical to a bunch of other licences."
OSI has a programme where it certifies software to see if it meets the organisation's definition of open source. Tim O'Reilly, CEO of O'Reilly Media, wrote in his personal blog soon after Matusow's address that while Microsoft has been regarded as the "enemy" of open source, the company has released source code to about 80 of its projects.
O'Reilly wrote that he believes the three licences may meet OSI approval, and urged Microsoft to become a full-fledged member of the open-source community.
"They are getting closer and closer to a tipping point," O'Reilly wrote. "Let's encourage them to go all the way! Be nice."
But some expressed scepticism over what code will be released and how it may intersect with Microsoft's business interests.
"Even when we do see the licences, they are not necessarily interesting because we have no idea what's going to be released under them," said Patrick Finch, who works in marketing for OpenSolaris at Sun. "And the assumption has to be the periphery of their business."
The effectiveness of the programe will also depend on what kind of community forms around the code that is released, and how close it will be to Microsoft's "crown jewel" software that people care about, said Alan Burlison, a staff engineer for OpenSolaris.
"It was all a bit vague," Burlison said of the announcement. "The principle, yes, is good."