#' Parse <elem> tag.
#' @param xml xml_document (returned by .unimodDb)
#' @return data.frame
#' @noRd
.elements <- function(xml) {
stopifnot(requireNamespace("xml2"))
elem <- xml2::xml_find_all(xml, "//umod:elements/umod:elem")
m <- do.call(rbind, xml2::xml_attrs(elem))
data.frame(
Name=m[, "title"],
FullName=m[, "full_name"],
AvgMass=as.double(m[, "avge_mass"]),
MonoMass=as.double(m[, "mono_mass"]),
row.names=m[, "title"],
stringsAsFactors=FALSE
)
}
## TODO: save data.frame elements as public available data set `data(elements)`
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