#' Vector of REDCap metadata headers
#'
#'
#' @format Vector of length 18 with REDCap metadata headers:
#' \describe{
#'   \item{metadata_names}{characterstrings}
#' }
#' @seealso project-redcap(dot)org (currently the certificate is broken)
#' @usage data(metadata_names)
"metadata_names"