- ABCDEFG - Access to Biological Collection Databases Extended for Geosciences
An extension of the ABCD standard for Geosciences data.
- BGS NGDC - British Geological Survey National Geoscience Data Centre
The world's oldest national geological survey and the United Kingdom's premier centre for earth science information and expertise, with information access via an ISO 19115-compliant discovery metadata database.
- GeoCASe - Geosciences Collection Access Service
The GeoCASe Network provides access to a transnational network of palaeontological, mineralogical, and geological data; providers are required to use ABCDEFG, an extention of ABCD, in their configuration files.