Randy,
You'll find parts of it in subsite::after_mount in acs-subsite/tcl/subsite-procs.tcl.
It creates member and admin rel segments, and grants appropriate privileges to those:
Snippet:
# Create segment of registered users for administrators
set segment_name "$truncated_subsite_name Administrators"
set admin_segment_id [rel_segments_new $subsite_group_id admin_rel $segment_name]
# Grant admin privileges to the admin segment
permission::grant \
-party_id $admin_segment_id \
-object_id $package_id \
-privilege admin
# Grant read/write/create privileges to the member segment
foreach privilege { read create write } {
permission::grant \
-party_id $segment_id \
-object_id $package_id \
-privilege $privilege
}
The rel-type is created upon installation time.
This is on oacs-4-6 tip, unreleased code, will go into an interim 4.6.4 release, and later 5.0 release.
/Lars