Microsoft chairman and chief software architect Bill Gates offered the first official peek at Longhorn, the next version of Windows expected out in 2006.
Longhorn will be "the biggest release of this decade, the biggest since Windows 95", Gates said in his opening keynote at Microsoft's Professional Developers Conference in Los Angeles.
With Longhorn, Microsoft will introduce a unified storage system, called WinFS for Windows Future Storage. The unified file system is the "Holy Grail" for Gates. "I have been talking about it for over a decade and finally here it is," he said
Together with a new engine underlying the Longhorn user interface codenamed Avalon, WinFS should make it easier for users to find and organise files on their PCs. The familiar directories and folders will be replaced with XML (extensible markup language) metadata, allowing users to easily find documents that relate to a specific project or topic, or all communications with one person, for example.
Longhorn will pull data out of the "silos" that are the individual applications, Gates said. Data will reside at the platform level, instead of at the application level. E-mail address book information, for example, will be accessible from multiple applications, instead of just the e-mail client.
WinFS will be based on technology from Yukon, the codename for the next version of Microsoft's SQL Server database due out next year. "Until we had a lot of this database technology we could not organize these things," Gates said.
Hillel Cooperman, product unit manager for the Windows user experience, demonstrated an early version of Longhorn. The user interface at first glance looked much like existing Windows versions, though with transparent Windows and a transparent sidebar that includes a clock, instant messenger contacts list and other information.
Cooperman also demonstrated new features of the file system. The "My Documents" icon on the desktop no longer opens a specific folder on the hard disc drive, but displays documents located anywhere on the system tagged with XML data. He displayed documents by project and sender.
Cooperman also opened a DOS application in Longhorn, demonstrating Microsoft's "over 20 years of commitment to interoperability".
Other enhancements in Longhorn will include the hardware-based security technology called Next-Generation Secure Computing Base (NGSCB) and Indigo, the code ame for a web services technology. Indigo will connect applications on a system as well across networks.
Software is what held back the digital decade in the past 10 years, according to Gates. "The expectations of the last decade required more time," he said. "It is simple to say where the constraint is in this era… It is software," not hardware. And Longhorn, of course, will deal with those constraints.
After Gates' presentation, Microsoft Group vice president Jim Allchin took the stage and delved into Longhorn specifics key to software developers, the target audience for the PDC.
Allchin, who heads the Platforms group, introduced a new application programming model called WinFX, the next step from Microsoft's .net Framework model. WinFX offers improvements in security and reliability, while also allowing a developer to work more effectively, according to Allchin. He also announced XAML, a new markup language for Avalon.
New performance-improving technologies in Longhorn include SuperFetch, which helps an application launch faster, and ClickOnce installation, which allows a user to install an application with one click and should speed up and simplify application deployment, Allchin said.
Microsoft's PDC runs until Thursday.
Joris Evers writes for IDG News Service