>It does, but that leaves the problem of lags, as in series(-1)
lag has description and 'patent' attribute within
Possibly, tokenizer could somehwo play  with it
Also, if I am not missing something, x(-1) a the first lag of x
can appear only in list creating or inside a coomand

nulldata 100

x = normal()

list li = x(-1)

ols x(-1) 0

It seems

function scalar x(scalar arg)

return arg

end function

So, x(-1) -> -1

This function can not appear

while creating lists,

Neither is possible to

use such function inside a command xlist

I think it is possible to force tokenizer

to distinguish

Oleh