[Users] uri, myself, etc., variables, + is_domain_local()

[Mark Price]

Hi,
I've got a few questions:

1. where can I find out what all the variables like uri, myself, etc., mean?
2. how come is_domain_local($ruri) has a different result than uri==myself?
In particular, I have my external IP address defined as an alias.  I.e.:
   alias=4.2.2.2
When I say if( ! is_domain_local($ruri) ) when $ruri = user at 4.2.2.2, the
check succeeds.
When I say if( ! uri==myself ), the check fails (correctly, I think).

Thanks,
Mark Price
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