[O] About documentation of macro replacement

[xfq]

I think info:org#Macro%20replacement should be refined.  I really don't
understand what this node is talking about.  It says:

  You can define text snippets with
     #+MACRO: name   replacement text $1, $2 are arguments

What does "$1", "$2" mean here?  It isn't mentioned before, and I only
know what it means in the spreadsheet.  And it doesn't look like a
C/Lisp/m4/TeX macro.

--
Best regards, Xue Fuqiao.
http://www.gnu.org/software/emacs/