Bio::DB::Taxonomy::list - An implementation of Bio::DB::Taxonomy that accepts lists of words to build a database


  use Bio::DB::Taxonomy;

  my $db = Bio::DB::Taxonomy->new( -source => 'list' );

  my @ranks = ('superkingdom', 'class', 'genus', 'species');
  my @names = ('Eukaryota', 'Mammalia', 'Homo', 'Homo sapiens');
  $db->add_lineage(-names => \@names, -ranks => \@ranks);

  @names = ('Eukaryota', 'Mammalia', 'Mus', 'Mus musculus');
  $db->add_lineage(-names => \@names, -ranks => \@ranks);


This is an implementation which uses supplied lists of words to create a database from which you can extract Bio::Taxon objects.


It is possible this module could do something like store the data it builds up to disc. Would that be useful? At any rate, this is why the module is called 'list' and not 'in_memory' or similar.


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AUTHOR - Sendu Bala



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


 Title   : new
 Usage   : my $obj = Bio::DB::Taxonomy::list->new();
 Function: Builds a new Bio::DB::Taxonomy::list object 
 Returns : an instance of Bio::DB::Taxonomy::list
 Args    : optional, as per the add_lineage() method.


 Title   : add_lineage
 Usage   : my @names = ('Eukaryota', 'Mammalia', 'Homo', 'Homo sapiens');
           my @ranks = ('superkingdom', 'class', 'genus', 'species');
           $db->add_lineage( -names => \@names, -ranks => \@ranks );
 Function: Add a lineage to the database, where the lineage is described by
           a list of scientific names in the order root->leaf. The rank of each
           name can optionally be described by supplying an additional list
           of rank names in the same order (eg. superkingdom->species).
 Returns : 1 for success
 Args    : -names => [] : array ref of scientific names, REQUIRED
           -ranks => [] : array ref of rank names, same order as above, OPTIONAL

Bio::DB::Taxonomy Interface implementation


 Title   : get_num_taxa
 Usage   : my $num = $db->get_num_taxa();
 Function: Get the number of taxa stored in the database.
 Returns : A number
 Args    : None


 Title   : get_taxon
 Usage   : my $taxon = $db->get_taxon(-taxonid => $taxonid)
 Function: Get a Bio::Taxon object from the database.
 Returns : Bio::Taxon object
 Args    : A single value which is the ID of the taxon to retrieve
             OR named args, as follows:
           -taxonid => Taxonomy ID (NB: these are not NCBI taxonomy ids but
                       'list' pre-fixed ids unique to the list database).
           -name    => String (to query by a taxonomy name). A given taxon name
                       can match different taxonomy objects. When that is the
                       case, a warning is displayed and the first matching taxon
                       is reported. See get_taxonids() to get all matching taxon
           -names   => Array ref of lineage names, like in add_lineage(). To
                       overcome the limitations of -name, you can use -names to
                       provide the full lineage of the taxon you want and get a
                       unique, unambiguous taxon object.


 Title   : get_taxonids
 Usage   : my @taxonids = $db->get_taxonids('Homo sapiens');
 Function: Searches for a taxonid (generated by the list module) based on a
           query string. Note that multiple taxonids can match to the same
           supplied name.
 Returns : array of integer ids in list context, one of these in scalar context
 Args    : string representing taxon's name


 Title   : ancestor
 Usage   : my $ancestor_taxon = $db->ancestor($taxon)
 Function: Retrieve the full ancestor taxon of a supplied Taxon from the
 Returns : Bio::Taxon
 Args    : Bio::Taxon (that was retrieved from this database)


 Title   : each_Descendent
 Usage   : my @taxa = $db->each_Descendent($taxon);
 Function: Get all the descendents of the supplied Taxon (but not their
           descendents, ie. not a recursive fetchall).
 Returns : Array of Bio::Taxon objects
 Args    : Bio::Taxon (that was retrieved from this database)