Search the OAI-PMH metadata by date, publisher, or identifier

Usage

oai_metadata(x = c("date", "publisher", "author", "title", "Study.id", "attributes"),
  metadata = NULL, ...)

Arguments

x
one of "date", "publisher", "identifier" for the study
metadata
returned from search_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 search_metadata

Value

a list of values matching the query

Description

Search the OAI-PMH metadata by date, publisher, or identifier

Examples

## <strong>Not run</strong>: # # automatically search each time # dates <- oai_metadata("date") # pub <- oai_metadata("publisher") # table(dates, pub) # ## <strong>End(Not run)</strong> # Using cached data from an earlier download data(metadata) dates <- oai_metadata("date", metadata=metadata)
Error in eval(expr, envir, enclos): could not find function "oai_metadata"
pub <- oai_metadata("publisher", metadata=metadata)
Error in eval(expr, envir, enclos): could not find function "oai_metadata"
table(dates, pub)
Error in table(dates, pub): object 'dates' not found