Polese: We provide support basically at the operating system level or above, and specifically what we're doing is certifying the common components that you find in the core stack, in the basic infrastructure stack -- like the application server, Web server, and database -- and then additional supporting components. So we're not getting down to the device driver level.

InfoWorld: So then a different table type for MySQL, for example, that might be a commercial product?

Polese: If it's part of the mainstream MySQL release, we are supporting it.

InfoWorld: Let's say there was some sort of add-on that was popular but was more or less commercial software, you wouldn't be interested in providing [support for that]?

Polese: We do certify with proprietary and commercial software, so Windows is a good example of that. If there was a popular commercial software product that was used in combination with open source, we would likely add it to the set of components that we validate.