[Q] xrefine do question (map)

[Clemens Vonrhein]

The help screen of the XREFINE DO statement gives some extra functions
for maps:

             <map-function>:== X | Y | Z | A | B | C | MULTiplicity |
                               GAVErage(x,x)

I found what the GAVErage(x,x) is. But what are the others and how do
I invoke them?

I'm asking since I want to get the map value at a specific (x,y,z)
coordinate. I was wondering if these X | Y | Z  functions are
something like that.

BTW: Is there an update of the X-PLOR manual planned?

Thanks

Clemens Vonrhein