Microsoft plans to add broad support for the Web publishing standard RSS in the next version of Windows, codenamed Longhorn, the company is expected to announce Friday at the Gnomedex 5.0 conference in Seattle.

Longhorn will include the ability for users to discover, view and subscribe to RSS feeds, as well as enable developers to incorporate RSS into new applications, said Gary Schare, director of strategic product management in Microsoft's Windows division. The new operating system is due for release in the second half of 2006.

RSS is primarily used by Web loggers and Web-based news publishers to keep subscribers informed when new Web log entries or news articles have been posted to Web sites.

As part of its RSS strategy, Microsoft also Friday will make available a set of XML tags called Simple List Extensions that expands RSS to better support the publishing of ordered lists of information, Schare said.

Simple List Extensions will be freely available through a Creative Commons License, a licensing model created by digital rights lawyer and open-source advocate Lawrence Lessig. The license allows Microsoft to reserve some, but not all the rights to the technology, Schare said.

While RSS is a reliable standard for updating information in message form, it currently has no logical way to organize that information in a way that could help subscribers keep track of what is being fed to them, he said. "RSS is good for delivering what’s new, but not so good for things that are getting sorted or reordered," Schare said.

By leveraging Simple List Extensions, users and developers can filter, sort and pivot content lists of information, he said. Also, because Microsoft is including RSS APIs within Longhorn, developers can use the code to integrate RSS-fed lists across other applications in the operating system, linking updated information to a user's Outlook calendar to notify them of upcoming events, for example.

While Microsoft maintains its interest in providing a development platform that can integrate RSS into third-party applications is purely benevolent, some believe the vendor has ulterior motives for supporting the standard, which currently is open and freely available to anyone who browses the Web and uses an RSS reader.

The IDG News Service is a Network World affiliate.