/ 
bioperl-1.5.2_004-RCd
/ Bio::Taxonomy

NAME

Bio::Taxonomy - representing Taxonomy.

SYNOPSIS

NB: This module is deprecated. Use Bio::Taxon in combination with
Bio::Tree::Tree methods instead.

use Bio::Taxonomy;

# CREATION: You can either create an instance by assigning it,
# or fetch it through factory.

# Create the nodes first. See Bio::Taxonomy::Node for details.
my $node_species_sapiens = Bio::Taxonomy::Node->new(
    -object_id => 9606, # or -ncbi_taxid. Requird tag
    -names => {
        'scientific' => ['sapiens'],
        'common_name' => ['human']
    },
    -rank => 'species'  # Required tag
);
my $node_genus_Homo = Bio::Taxonomy::Node->new(
    -object_id => 9605,
    -names => { 'scientific' => ['Homo'] },
    -rank => 'genus'
);
my $node_class_Mammalia = Bio::Taxonomy::Node->new(
    -object_id => 40674,
    -names => {
        'scientific' => ['Mammalia'],
        'common' => ['mammals']
    },
    -rank => 'class'
);
my $taxonomy = Bio::Taxonomy->new;
$taxonomy->add_node($node_class_Mammalia);
$taxonomy->add_node($node_species_sapiens);
$taxonomy->add_node($node_genus_Homo);

# OR you can fetch it through a factory implementing
# Bio::Taxonomy::FactoryI
my $factory;

my $taxonomy = $factory->fetch_by_ncbi_taxid(40674);

# USAGE

# In this case, binomial returns a defined value.
my $binomial = $taxonomy->binomial;

# 'common_names' refers to the lowest-rank node's common names, in
# array.
my @common_names = $taxonomy->common_names;

# 'get_node', will return undef if the rank is no defined in
# taxonomy object.  It will throw error if the rank string is not
# defined, say 'species lah'.
my $node = $taxonomy->get_node('class');
my @nodes = $taxonomy->get_all_nodes;

# Also, you can search for parent and children nodes, if taxonomy
# comes with factory.

my $parent_taxonomy = $taxonomy->get_parent

DESCRIPTION

Bio::Taxonomy object represents any rank-level in taxonomy system, rather than Bio::Species which is able to represent only species-level.

There are two ways to create Taxonomy object, e.g. 1) instantiate an object and assign all nodes on your own code; and 2) fetch an object by factory.

Creation by instantiation

The abstraction of Taxonomy is actually a hash in data structure term. The keys of the hash are the rank names, such as 'genus' and 'species', and the values are the instances of Bio::Taxonomy::Node.

Creation by Factory fetching

NCBI Taxonomy system is well accepted as the standard. The Taxonomy Factories in bioperl access this system, through HTTP to NCBI Entrez, dump file, and advanced biosql database.

Bio::Taxonomy::FactoryI defines all methods that all implementations must obey.

$factory->fetch is a general method to fetch Taxonomy by either NCBI taxid or any types of names.

$factory->fetch_parent($taxonomy), returns a Taxonomy that is one-step higher rank of the taxonomy specified as argument.

$factory->fetch_children($taxonomy), reports an array of Taxonomy those are one-step lower rank of the taxonomy specified as the argument.

Usage of Taxonomy object

##

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 list. Your participation is much appreciated.

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

Reporting Bugs

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

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

CONTACT

Juguang Xiao, juguang@tll.org.sg

APPENDIX

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

new

Title   : new
Usage   : my $obj = new Bio::Taxonomy();
Function: Builds a new Bio::Taxonomy object
Returns : Bio::Taxonomy
Args    : -method  -> method used to decide classification
                      (none|trust|lookup)
          -ranks   -> what ranks are there

method

Title   : method
Usage   : $obj = taxonomy->method($method);
Function: set or return the method used to decide classification
Returns : $obj
Args    : $obj

classify

Title   : classify
Usage   : @obj[][0-1] = taxonomy->classify($species);
Function: return a ranked classification
Returns : @obj of taxa and ranks as word pairs separated by "@"
Args    : Bio::Species object

level_of_rank

Title   : level_of_rank
Usage   : $obj = taxonomy->level_of_rank($obj);
Function: returns the level of a rank name
Returns : $obj
Args    : $obj

rank_of_number

Title   : rank_of_number
Usage   : $obj = taxonomy->rank_of_number($obj);
Function: returns the rank name of a rank level
Returns : $obj
Args    : $obj

ranks

Title   : ranks
Usage   : @obj = taxonomy->ranks(@obj);
Function: set or return all ranks
Returns : @obj
Args    : @obj

add_node

Title:    add_node
Usage:    $obj->add_node($node[, $node2, ...]);
Function: add one or more Bio::Taxonomy::Node objects
Returns:  None
Args:     any number of Bio::Taxonomy::Node(s)

binomial

Title   : binomial
Usage   : my $val = $obj->binomial;
Function: returns the binomial name if this taxonomy reachs species level
Returns : the binomial name
          OR undef if taxonmy does not reach species level
Args    : [No arguments]

get_node

Title   : get_node
Usage   : $node = $taxonomy->get_node('species');
Function: get a Bio::Taxonomy::Node object according to rank name
Returns : a Bio::Taxonomy::Node object or undef if null
Args    : a vaild rank name

classification

Title   : classification
Usage   : @names = $taxonomy->classification;
Function: get the classification names of one taxonomy
Returns : array of names
Args    : [No arguments]