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Bio::SeqFeature::Tools::TypeMapper.3pm

NAME

Bio::SeqFeature::Tools::TypeMapper - maps $seq_feature->primary_tag

SYNOPSIS

   use Bio::SeqIO;
   use Bio::SeqFeature::Tools::TypeMapper;
 
   # first fetch a genbank SeqI object
   $seqio =
     Bio::SeqIO->new(-file=>'AE003644.gbk',
                     -format=>'GenBank');
   $seq = $seqio->next_seq();
 
   $tm = Bio::SeqFeature::Tools::TypeMapper->new;
 
   # map all the types in the sequence
   $tm->map_types(-seq=>$seq,
                  {CDS=>'ORF',
                   variation=>sub {
                       my $f = shift;
                       $f->length > 1 ?
                         'variation' : 'SNP'
                   },
                  });
 
    # alternatively, use the hardcoded SO mapping
    $tm->map_types_to_SO(-seq=>$seq);
 
 

DESCRIPTION

This class implements an object for mapping between types; for example, the types in a genbank feature table, and the types specified in the Sequence Ontology.

You can specify your own mapping, either as a simple hash index, or by providing your own subroutines.

FEEDBACK

Mailing Lists

User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to 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
 
 

Support

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

bioperl-l@bioperl.org

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.

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 web:

   http://bugzilla.open-bio.org/
 
 

AUTHOR - Chris Mungall

Email: cjm@fruitfly.org

APPENDIX

The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _

new

  Title   : new
  Usage   : $unflattener = Bio::SeqFeature::Tools::TypeMapper->new();
  Function: constructor
  Example : 
  Returns : a new Bio::SeqFeature::Tools::TypeMapper
  Args    : see below
 
 

typemap

  Title   : typemap
  Usage   : $obj->typemap($newval)
  Function: 
  Example : 
  Returns : value of typemap (a scalar)
  Args    : on set, new value (a scalar or undef, optional)
 
 

map_types

  Title   : map_types
  Usage   :
  Function:
  Example :
  Returns : 
  Args    :
 
  dgg: added -undefined => "region" option to produce all valid SO mappings.
 
 

map_types_to_SO

  Title   : map_types_to_SO
  Usage   :
  Function:
  Example :
  Returns : 
  Args    :
 
 

hardcodes the genbank to SO mapping

Based on revision 1.22 of SO

Please see the actual code for the mappings

Taken from

<http://sequenceontology.org/resources/mapping/FT_SO.txt>

dgg: separated out FT_SO_map for caller changes. Update with:

   open(FTSO,"curl -s http://sequenceontology.org/resources/mapping/FT_SO.txt|");
   while(<FTSO>){
     chomp; ($ft,$so,$sid,$ftdef,$sodef)= split"\t";
     print "     '$ft' => '$so',\n" if($ft && $so && $ftdef);             
   }
 
 

get_relationship_type_by_parent_child

  Title   : get_relationship_type_by_parent_child
  Usage   : $type = $tm->get_relationship_type_by_parent_child($parent_sf, $child_sf);
  Usage   : $type = $tm->get_relationship_type_by_parent_child('mRNA', 'protein');
  Function: given two features where the parent contains the child,
            will determine what the relationship between them in
  Example :
  Returns : 
  Args    : parent SeqFeature, child SeqFeature OR
            parent type string, child type string OR
 
 

bioperl Seq::FeatureHolderI hierarchies are equivalent to unlabeled graphs (where parent nodes are the containers, and child nodes are the features being contained). For example, a feature of type mRNA can contain features of type exon.

Some external representations (eg chadoxml or chaosxml) require that the edges in the feature relationship graph are labeled. For example, the type between mRNA and exon would be part_of. Although it stretches the bioperl notion of containment, we could have a CDS contained by an mRNA (for example, the Bio::SeqFeature::Tools::Unflattener module takes genbank records and makes these kind of links. The relationship here would be produced_by

In chado speak, the child is the subject feature and the parent is the object feature