Is Generate Sequence Numbers (with \i) unique to TextPad?

[kengrubb]

This is one of my stupid questions. I work so much in TP, and I just assume the rest of the world plays catch, though perhaps it does not.

Is \i something unique to TP? It seems so simple and logical that I assumed it was part of Regex. However, it appears that perhaps I assumed incorrectly and this is instead a brilliant bit of work by Helios that has been ignored by the world.

I am both sadder and happier. Sadder for the world. Happier for me in that I know and use TP.