Artifacts using DataONE (2)

Serves data from the United States Environmental Protection Agency (USEPA) National Eutrophication Survey <https://www.epa.gov/national-aquatic-resource-surveys>.

Provide methods to record data provenance about R script executions. Provenance data includes files that were read and written by the script, along with information about the execution, such as start time end time, the R modules loaded during the execution, and other information describing the execution environment.