\name{taxId}
\alias{taxId}
\title{A method to return all the unique taxonomy IDs indexing 
       the unique organisms upon which the data is based}
\description{
The \code{taxId} function takes an intactInteraction class and
returns the unique taxId indexing the organism names upon which 
the data is based.
}
\usage{
taxId(x)
}
\arguments{
  \item{x}{A S4 object of type intactInteraction}
  }
\value{
A character vector of the unique taxonomy Ids}
\references{The IntAct Database \url{http://www.ebi.ac.uk/intact/site/contents/downloads.jsf}.}
\author{T Chiang}

\seealso{\code{\intactInteraction-class}}

\examples{
# parse complex data
}
\keyword{ models }