[Koha-devel] what is a 'PE' branch ?

[Paul POULAIN]

Hello,

could someone explain to me what is the meaning (functionnaly speaking) 
of this portion of code :
(C4/Circulation.pm)
        # check if the book is in a permanent collection....
        my $hbr      = $iteminformation->{'homebranch'};
        my $branches = GetBranches();
        if ( $hbr && $branches->{$hbr}->{'PE'} ) {
            $messages->{'IsPermanent'} = $hbr;
        }