I would prefer us not to "expose" anything "CMIS" via the SDK. I know it's a bit "odd" but could you please move this to the InternalConstants file.

Overriding the CMIS network provider is an 'advanced' thing to do and something developers would have to "know" how to do so not having a public constant defined is fine I think.

Feel free to define the constant in the app though. I hope that all makes sense!