an object of class "GS", a list with following components:
set_info: a matrix of nSet X 4 containing gene set
information, where nSet is the number of gene sets (i.e. HPPA terms),
and the 4 columns are "setID" (i.e. "Term ID"), "name" (i.e. "Term
Name"), "namespace" and "distance"
gs: a list of gene sets, each storing gene members
thereof. Always, gene sets are identified by "setID" and gene members
identified by "Entrez ID"
References
Robinson et al. (2012) The Human Phenotype Ontology: a tool for
annotating and analyzing human hereditary disease. Am J Hum
Genet, 83:610-615.