Currently, draft
says select/seize everywhere but doesnt fully define what this means.
Proposal: Use definitions proposed by Francois
Seizing: An appearance can
be seized by communicating an
artificial state of
"trying" prior to actually initiating a dialog,
in order to appear as it was
already initiating a dialog. The
appearance
number is confirmed prior to
sending the INVITE.
Selecting(or Not-Seizing):
An appearance is merely selected
(i.e., not seized) if there
is no such communication of
artificial state of
"trying" prior to initiating a dialog: i.e., the state is
communicted when the dialog
is actually initiated. The appearance
number is learned after the
INVITE is sent. This is a UI-only
issue.