Where are the keysyms for .inputrc defined?

I was looking at this answer , and it lists a "keysym": \e[11~ to define pressing F1. What are keysyms and where can I get a list of them as \e[11~ doesn't seem to correlate with anything I'm aware of in the Terminal; and I'm using SSH to test this out, so X11 or Windows Managers don't really come into play here.