\HeaderA{KEGGPATHID2EXTID}{An annotation data file that maps KEGG pathway identifiers to Entrez Gene
or Open Reading Frame identifiers.}{KEGGPATHID2EXTID}
\keyword{datasets}{KEGGPATHID2EXTID}
\begin{Description}\relax
KEGGPATHID2EXTID maps KEGG pathway identifiers to Entrez Gene (for human,
mouse, and rat) or Open Reading Frame (for yeast) identifiers
\end{Description}
\begin{Details}\relax
This is an environment object containing key and value pairs. Keys are
KEGG pathway identifiers and values are Entrez Gene identifiers for human, mouse, and
rat or Open Reading Frame (ORF) identifiers for yeast. Values are
vectors of length 1 or greater depending on whether a pathway identifier can
be maapped to one or more Entrez Gene or ORF identifiers. NAs are
assigned to KEGG pathway identifiers that can not be mapped to any Entrez Gene
or ORF identifiers. 

KEGG pathway identifiers are the identifiers used by KEGG for various
pathways.

Mappings between KEGG pathway identifiers and pathway names can be obtained
through another environment named PATHID2NAME. 

Mappings were based on data provided by:

KEGG:\url{http://gopher5/compbio/annotationSourceData/kegg/pathways/map_title.tab}. Built: Release 38.1, June 1, 2006

Package built: Wed Sep  6 13:12:02 2006
\end{Details}
\begin{References}\relax
\url{ftp://ftp.genome.ad.jp/pub/kegg/pathways}
\end{References}
\begin{Examples}
\begin{ExampleCode}
        require("annotate") || stop("annotate unavailable")
        xx <- as.list(KEGGPATHID2EXTID)
        if(length(xx) > 0){
                # Get the value of the first key
                xx[[1]]
                # Get the values for multiget for a few keys
                if(length(xx) >= 3){
                        xx[1:3]
                }
        }
\end{ExampleCode}
\end{Examples}