#!/usr/bin/perl

use strict;
use Bio::DB::GFF;

my $db  = Bio::DB::GFF->new(-user        => 'bio',
			    -pass        => 'bio',
			    -dsn         => 'elegans',
                            -aggregators => 'gene_model{coding_exon,5_UTR,3_UTR/CDS}');

my $gene_stream = $db->get_seq_stream('gene_model:curated');

while (my $gene = $gene_stream->next_seq) {
  print $gene->name,"\n";
  for my $part ($gene->get_SeqFeatures) {
    print "\t",join("\t",$part->method,$part->start,$part->end),"\n";
  }
  print "\n";
}

##</code><code>##

2L52.1

------------- EXCEPTION Bio::Root::NotImplemented -------------
MSG: Abstract method "Bio::FeatureHolderI::get_SeqFeatures" is not implemented by package Bio::DB::GFF::Feature.
This is not your fault - author of Bio::DB::GFF::Feature should be blamed!