Please don't do it.

I do not think that proprietary things should be considered standard. A standard should be something which is available for people to incorporate into what they are making; screw threads, for instance, or bolt sizes. I can make an oddly sized bolt and say that it's the Acme Standard Bolt, but it would be useless anywhere else, and someone going to a hardware store for a replacement of an Acme device would discover that they're impossible to find.
Similarly, I can make a markup language up and claim that it's a standard, despite the obvious fact that it isn't, especially because it's used nowhere but in my software. Would the W3C give it their stamp of approval? (insert sardonic laughter here) No, because the W3C knows that would be stupid. Would the W3C give it their stamp of approval if I happened to be a company with lots of money? I would hope it has more integrity than that.
Don't dilute the meaning behind "standard", it's an important concept that we would do well not to lose.

matthew@synature.com