JOINT SESSION IG Domain Repositories, IG Agriculture Data, WG BioSharing Registry, IG Materials Data, WG Wheat Data RDA P6, Paris,

Metadata Development in Astronomy Robert Hanisch Office of Data and Informatics National Institute of Standards and Technology

3  Developed in the context of the International Virtual Observatory Alliance, beginning in 2002 and iterating/improving through 2007  Based on Dublin Core  Astro-centric extensions  IVOA standard IVOA standard  Deployed in a federated system of Resource Registries with several independent software implementations Discovery Metadata

4 Federated Registry Architecture 4 Data Centers Local Publishing Registry Full Searchable Registry Local Publishing Registry Full Searchable Registry (pull) harvest replicate search queries Users, applications OAI/PMH