(character) OAI-PMH base url. Defaults to the URL for
arXiv's OAI-PMH server (http://export.arxiv.org/oai2)
or GBIF's OAI-PMH server (http://api.gbif.org/v1/oai-pmh/registry)
token
(character) a token previously provided by the server to
resume a request where it last left off
as
(character) What to return. One of "df" (for data.frame; default),
"list", or "raw" (raw text)
if (FALSE) {
# Get back a data.framelist_sets()
# Get back a listlist_sets(as = "list")
# Get back raw textlist_sets(as = "raw")
# curl optionslibrary("httr")
list_sets(config = verbose())
}