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Open Specifications Dev Center

Through the Open Specifications program, Microsoft is helping developers open new opportunities by making technical documents related to interoperability for certain popular Microsoft products available to view and download from MSDN at no charge. This documentation includes protocols, computer languages, standards support, and data portability.

Although the technical documents are freely available, many of them include patented inventions. Some of these patents are available at no charge under the patent promises. The remaining patents are available through various programs. For more information, please see the Programs and Patents links.

You can learn about the Microsoft commitment to interoperability by watching our Open Specifications Plugfest videos, such as the Interoperability Protocols Keynote. Find the videos and other support for Open Specifications implementations by using the Documentation, News, Plugfests and Events, Test Tools, Support, and Case Studies links.


Programs, patent pledges,
and interoperability principles


Patent map, patent promises, and
the Open Web Foundation Agreement


Technical documents for
protocols, languages, standards
support, and data portability


Recent newsletters and highlights
from the interoperability
and Open Specifications blogs

Plugfests and Events

Upcoming and past events,
Open XML and ODF, Document
Interoperability Initiative

Test Tools

Message Analyzer, test suites,
validators, interoperability labs,
and more


Forums, blogs, Microsoft Support,
knowledge base, partner
programs, and more

Case Studies

Companies have used the Open
Specifications for innovative,
interoperable solutions