<tool id="get_child_terms" name="Get the child terms of a given OBO term" version="1.22">
  <description>Collects the child terms from a given term in the given OBO ontology</description>
  <command interpreter="perl">/usr/bin/get_child_terms.pl $input_ontology $term_id > $output</command>
  <inputs>
    <param format="text" name="input_ontology" type="data" label="Source file"/>
    <param name="term_id" type="text" size="30" value="" label="Term ID" />
  </inputs>
  <outputs>
    <data format="tabular" name="output" />
  </outputs>

  <tests>
    <test>
      <param name="input" value="pre_cco_core.obo"/>
      <param name="term_id" value="CCO:P0000020"/>
      <output name="out_file" file="children.txt"/>
    </test>
  </tests>

  <help>

.. class:: infomark

Collects the child terms (list of IDs) from a given term (existing ID) in the given OBO ontology.

**Example**

If you ask for the children of the Gene Ontology term with ID **GO:0000079** you will get::

  GO:0031660      regulation of cyclin-dependent protein kinase activity during G2/M
  GO:0031657      regulation of cyclin-dependent protein kinase activity during G1/S
  GO:0045737      positive regulation of cyclin-dependent protein kinase activity
  GO:0045736      negative regulation of cyclin-dependent protein kinase activity

**More information**

  ONTO-PERL: An API supporting the development and analysis of bio-ontologies
  E. Antezana; M. Egana; B. De Baets; M. Kuiper; V. Mironov
  Bioinformatics 2008; doi: 10.1093/bioinformatics/btn042

  </help>

</tool>