Extract taxonomic data from a set of sites.
# S4 method for class 'sites'
taxa(object)A data.frame reporting the taxa/data objects, units,
elements and other features within a set of records.
if (FALSE) { # \dontrun{
somesites <- get_sites(datasettype = "diatom") %>%
get_downloads()
diatomtaxa <- taxa(somesites)
} # }