Search the OAI-PMH metadata by date, publisher, or identifier
oai_metadata(
x = c("date", "publisher", "author", "title", "Study.id", "attributes"),
metadata = NULL,
...
)
a list of values matching the query
one of "date", "publisher", "identifier" for the study
returned from download_metadata
function.
if not specified will download latest copy from treebase. Pass
in the value during repeated calls to speed function runtime substantially
additional arguments to download_metadata