\name{exonScaffold}
\alias{exonScaffold}
\title{stand alone function to generate a scaffold containing only exon location from ENSEMBL}
\description{
   The scaffold contains chr stand start and end position of exon. Ensembl geneID and exonID together with exon rank are also provided
}
\usage{exonScaffold(genome)}
\arguments{
\item{genome}{The genome code for H sapiens is hg19, for M musculus is mm9 and for R norvegicus is rn4}

}
\details{
  The scaffold is used to map reads data into regions only associated to exons 
}
\author{Raffaele A Calogero}
\keyword{utilities}