\HeaderA{genbank}{A function to open the browser to Genbank with the selected gene.}{genbank}
\keyword{interface}{genbank}
\begin{Description}\relax
Given a vector of Genbank accession numbers or NCBI UIDs, the user can
either have a browser display a URL showing a Genbank query for those
identifiers, or a XMLdoc object with the same data.
\end{Description}
\begin{Usage}
\begin{verbatim}
genbank(...,disp=c("data","browser"), type=c("accession","uid"),
        pmaddress=.pmfetch("Nucleotide", disp, type))
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{...}] Vectorized set of Genbank accession numbers or NCBI UIDs
\item[\code{disp}] Either "Data" or "Browser" (default is data).  Data
returns a XMLDoc, while Browser will display information in the
user's browser.
\item[\code{type}] Denotes whether the arguments are accession numbers or
UIDS.  Defaults to accession values.
\item[\code{pmaddress}] Specific path to the pubmed pmfetch engine from the
NCBI website.
\end{ldescription}
\end{Arguments}
\begin{Details}\relax
A simple function to retrieve Genbank data given a specific ID, either
through XML or through a web browser.  This function will accept
either Genbank accession numbers or NCBI UIDs (defined as a Pubmed
ID or a Medline ID) - although the types must not be mixed in a single
call. 

WARNING:  The powers that be at NCBI have been known to ban the IP
addresses of users who abuse their servers (currently defined as less
then 2 seconds between queries).  Do NOT put this function in a tight
loop or you may find your access revoked.
\end{Details}
\begin{Value}
If the option "data" is used, an object of type XMLDoc is returned,
unless there was an error with the query in which case an object of
type try-error is returned.

If the option "browser" is used, nothing is returned.
\end{Value}
\begin{Author}\relax
R. Gentleman
\end{Author}
\begin{SeeAlso}\relax
\code{\LinkA{pubmed}{pubmed}}, \code{\LinkA{locuslinkByID}{locuslinkByID}},
\code{\LinkA{locuslinkQuery}{locuslinkQuery}}, \code{\LinkA{xmlTreeParse}{xmlTreeParse}}
\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
   ## Use UIDs to get data in both browser & data forms

   if ( interactive() ) {
      disp <- c("data","browser")
   } else {
      disp <- "data"
   }

   for (dp in disp)
     genbank("12345","9997",disp=dp,type="uid")

   ## Use accession numbers to retrieve browser info
   if ( interactive() )
       genbank("U03397","AF030427",disp="browser")
\end{ExampleCode}
\end{Examples}