[t1c]

If you're serious about making this a standard, you should think about making it a proposal to be an ISO standard, much like how QR codes are.

[cereallarceny]

I definitely will at some point. I haven't seen an attempt at a standard here. For now, I'd like to solidify the current libraries and prototype them with real users. Based on what I learn from there, and ISO proposal could be in the future. :)