# This module is licensed under the same terms as Perl itself. You use,
# modify, and redistribute it under the terms of the Perl Artistic License.

=head1 NAME

Bio::IdCollectionI - interface for objects with multiple identifiers


    # to test this is an identifiable collection object

    $obj->isa("Bio::IdCollectionI") ||
      $obj->throw("$obj does not implement the Bio::IdCollectionI interface");

    # accessors
    @authorities = $obj->id_authorities();
    @ids         = $obj->ids();
    $id          = $obj->ids($authority);


This interface describes methods expected on objects that have
multiple identifiers, each of which is controlled by a different


=head2 Mailing Lists

User feedback is an integral part of the evolution of this and other
Bioperl modules. Send your comments and suggestions preferably to one
of the Bioperl mailing lists.  Your participation is much appreciated.

  bioperl-l@bioperl.org                  - General discussion
  http://bioperl.org/wiki/Mailing_lists  - About the mailing lists

=head2 Support 

Please direct usage questions or support issues to the mailing list:


rather than to the module maintainer directly. Many experienced and 
reponsive experts will be able look at the problem and quickly 
address it. Please include a thorough description of the problem 
with code and data examples if at all possible.

=head2 Reporting Bugs

Report bugs to the Bioperl bug tracking system to help us keep track
the bugs and their resolution.  Bug reports can be submitted via the


=head1 AUTHOR - Lincoln Stein

Email lstein@cshl.org


package Bio::IdCollectionI;
$Bio::IdCollectionI::VERSION = '1.7.8';
use strict;

use base qw(Bio::Root::RootI);

=head1 Implementation Specific Functions

These functions are the ones that a specific implementation must

=head2 id_authorities

 Title   : id_authorities
 Usage   : @array    = $obj->id_authorities()
 Function: Return the authorities which have names for this object.
           The authorities can then be used to select ids.

 Returns : An array
 Status  : Virtual


sub id_authorities {
   my ($self) = @_;

=head2 ids

 Title   : ids
 Usage   : @ids    = $obj->ids([$authority1,$authority2...])
 Function: return a list of Bio::IdentifiableI objects, optionally
           filtered by the list of authorities.

 Returns : A list of Bio::IdentifiableI objects.
 Status  : Virtual


sub ids {
   my ($self) = @_;
   my @authorities = @_;