How can a client identify the window manager version?

[Russell Shaw]

Jim Gettys wrote:
> The danger Carsten points out is very real: we'd end up with code that
> says "if this window manager, then do the following" (which might not
> even be true in the next version of that window manager), rather than
> code that says "if this window manager feature is present, then do the
> following", which isn't brittle against different window managers and/or
> versions of window managers, and the application can have a chance to
> continue to work into the future.
> 				Regards,
> 					- Jim

Better it would be for the client to detect the wm and say: this wm is a
non-standards compliant broken piece of crap. I'm not running;)