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The Common Metadata Repository (CMR) catalogs all data and service metadata records for the EOSDIS system and will be the authoritative management system for all EOSDIS metadata.  These metadata records are registered, modified, discovered, and accessed through programmatic interfaces leveraging standard protocols and APIs.

CMR is designed:

• to serve as a middleware replacement for the ECHO and GCMD’s backend. Note: Users of GCMD should see no impact - as the GCMD frontend will remain as is.
• to handle metadata at the Concept level; including Collections, Granules, Visualizations, Parameters, Documentation, Services, and more.
• to manage hundreds of millions of metadata records; making them available through high performance, standards compliant, temporal, spatial, and faceted search.
• to incorporate both human and machine metadata assessment features that work to ensure the highest quality metadata possible
• around an evolvable Unified Metadata Model (UMM).

             CMR Links                                                                        UMM Links

• CMR Documents                                                               UMM Documents
• API Documentation
• CMR Client Developer Information
• CMR Metadata Provider Information
• CMR Reconciliation Information
• CMR Team Activities