… in a roundabout way.
After long discussion with Ken Guest, we came up with a way to validate PPS numbers (Irish identity numbers).
I proposed some code, and it has was accepted in full and is now part of Pear!
It’s the green bit in this diff between version 1.14 and version 1.13 of Validate/IE.
Of course, I didn’t write the API documentation – what, me comment? are you mad?