As part of its interoperability announcement Microsoft has said it would work with open standards bodies to help...
developers support Microsoft extensions that affect interoperability with other implementations of these standards.
Microsoft said these actions would allow third-party developers implementing standards to understand how a standard is used in a Microsoft product and foster improved interoperability for customers. Microsoft said it would also make available a list of any of its patents that cover any of these extensions, and will make available patent licences on reasonable and non-discriminatory terms.
In response to user-concerns over document format incompatibility, the software giant said it would extend Office 2007 to provide greater flexibility of document formats. It plans to introduce new APIs for the Word, Excel and PowerPoint applications in Office 2007 to enable developers to plug in additional document formats and to enable users to set these formats as their default for saving documents.