Universal Adapter for any Data Source that follows OAI-PMH protocol

[hudaif747]

Description

Instead of adding proxy for specific data source like PANGAEA and GBIF add a universal proxy for any data source that follows OAI-PMH protocol for the metadata

[hudaif747]

Implemented discovering metadata schema formats for data repositories that follow OAI-PMH protocol via the ListMetaDataFormat verb.

[hudaif747]

More on Ariadne Portal and NASA Technical Reports Server (NTRS)

[Pawandeep-Kaur-Betz]

As mentioned also keep the configuration adapter option open.