\HeaderA{KEGGEXTID2PATHID}{An annotation data file that maps Entrez Gene or Open Reading Frame
identifiers KEGG pathway identifiers}{KEGGEXTID2PATHID}
\keyword{datasets}{KEGGEXTID2PATHID}
\begin{Description}\relax
KEGGEXTID2PATHID maps Entrez Gene (for human, mouse, and rat)
and Open Reading Frame (for yeast) identifiers to KEGG pathway identifiers.
\end{Description}
\begin{Details}\relax
This is an environment object containing key and value pairs. Keys are
Entrez Gene identifiers for human, mouse, and rat and Open Reading Frame (ORF) identifiers for
yeast and values are the corresponding KEGG pathway identifiers. Values are
vectors of length 1 or greater depending on whether a given external
identifier can be mapped to only one or more KEGG pathway identifiers.  NAs are
assigned to Entrez Gene or ORF identifiers that can not be mapped to any pathway
identifier.

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(KEGGEXTID2PATHID)
        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}