##' Example seed data for the vignette.
##'
##' The data contain seed data from 8 countries, 140 commodities and spanning
##' the years 1994-2013. The countries were not randomly chosen: some were
##' picked because of the availability of area sown variables (which is
##' generally rather rare).
##'
##' The rather cryptic columns correspond to what exists in the SWS:
##' \itemize{
##' \item{geographicAreaM49: }{The M49 codes specifying the country}
##' \item{measuredItemCPC: }{The codes specifying the commodity}
##' \item{timePointYears: }{The year of the observation}
##' \item{Element_5025: }{These three variables correspond to area sown.
##' The value variable contains the data, and the flagObservationStatus and
##' flagMethod variables contain the flags.}
##' \item{Element_5312: }{Area Harvested}
##' \item{Element_5525: }{Seed usage}
##' }
##'
##' @docType data
##' @keywords datasets
##' @name seedData
##' @usage data(seedData)
##' @format A data.table object with 8960 rows and 12 variables
##'
NULL
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