Collects the descendent terms (list of IDs) from a given term (existing ID) in the given OBO ontology.
Example
If you ask for the descendents of the Gene Ontology term with ID GO:000741 you will get:
GO:0048288 nuclear membrane fusion during karyogamy GO:0000745 nuclear migration during conjugation without cellular fusion GO:0000744 karyogamy during conjugation without cellular fusion GO:0032871 regulation of karyogamy GO:0007344 pronuclear fusion GO:0000742 karyogamy during conjugation with cellular fusion GO:0010197 polar nucleus fusion GO:0000743 nuclear migration during conjugation with cellular fusion