Is there something like a list of all the attributes and local variables for vex, that houdini knows we can use, a cheat sheet maybe? (stuff like @primnum are local variables right?) From time to time I see people using attributes whose functionality I can't find, let alone know they exist.

Maybe this is what you're looking for?

http://www.sidefx.com/docs/houdini/vex/snippets#attributes [www.sidefx.com]

I know about that page, but not certain if that's all of them. They are also not explained. I learned many of them through the forums and the wiki but for example I don't know what's pstate. I googled pstate before writing the reply but and i found the answer again outside houdini's documentation not inside. Also having the explanation of all the variables in one place is handy for newbs like me and maybe more advanced users?