Get provenance metadataSource:
Generates the provenance metadata of a source data package
(character) Data package identifier
(character) Repository environment. Can be: "production", "staging", or "development".
(xml_document) Provenance metadata of
a <methodStep> element that can be inserted into the <methods> section of a
dependent data package.
See the emld library for more on working with EML as a list or JSON-LD. See the xml2 library for working with EML as XML.