Roberto, there is no real documentation as far as I know. One general
tip though: When you want to do something like create users or add
users to groups, look at the way the stock ACS Tcl code does it, as it
frequently is NOT as simple as calling what you would think are the
correct PL/SQL functions. This sort of "learn by example" is the only
reliable way to pick up this stuff, I think.
For example, from PL/SQL, the correct way to create a new ACS user is
acs.add_user() - NOT with
acs_user.new APPEARS to
work, but does not quite do all the right things.) But the only way
to realize this it to read the Tcl code.
For adding a user to a group, on the other hand, this:
v_rel_id := membership_rel.new(
object_id_one => v_group_id
,object_id_two => v_person_id
does the right thing, as you might expect. But it sounds like you
already figured all that out, despite the cryptic nature of object
"one" vs. "two".