\HeaderA{GOCCOFFSPRING}{Annotation of GO Identifiers to their Cellular Component Offspring}{GOCCOFFSPRING}
\keyword{datasets}{GOCCOFFSPRING}
\begin{Description}\relax
This is an R environment (hash table) mapping GO ids to all the GO
ids of their offspring based on the  cellular component (CC) GO terms. Offspring are
defined as the direct or indirect children/grand children nodes of a
given node for a GO id based on the directed acyclic graph defined by
Gene Ontology Consortium. GO terms for offspring nodes are more specific
than that of the parent.
\end{Description}
\begin{Details}\relax
GO ids are keys and the corresponding offspring GO ids are
values. Values are vectors of GO ids for all the offspring of the key
GO id. GO ids that do not have any offspring node are assigned NA as
the value. 

Cellular component is defined as the subcellular structures,
locations, and macromolecular complexes; examples include nucleus,
telomere, and origin recognition complex as defined b y Gene Ontology
Consortium. 

Mappings were based on data provided:

Gene Ontology:\url{http://gopher5/compbio/annotationSourceData/archive.godatabase.org/latest/}. Built: 200509

Package built: Fri Sep 30 02:51:32 2005
\end{Details}
\begin{References}\relax
\url{http://www.geneontology.org/} and
\url{http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene}
\end{References}
\begin{Examples}
\begin{ExampleCode}
  require("GO", character.only = TRUE) || stop("GO unavailable")
  # Convert the environment object to a list
  xx <- as.list(GOCCOFFSPRING)
  # Remove GO ids that do not have any offspring
  xx <- xx[!is.na(xx)]
  if(length(xx) > 0){
    # Get the offspring GO ids for the first two elents of xx
    goids <- xx[1:2]
  }
\end{ExampleCode}
\end{Examples}