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Unified Metadata Model (UMM) profiles are documents which provide a schema-agnostic representation of the elements necessary to provide complete metadata with respect to recommended EOSDIS concepts, and which map those elements to each CMR-supported metadata dialect (e.g. ECHO, DIF, ISO). 

The UMM-Collection Profile consists of metadata concepts considered important for describing CMR data collections. The UMM-Collection Profile includes required, recommended and optional concepts.  Required concepts must be included in UMM-compliant CMR metadata records.

The goal of this effort is to help NASA Data Centers provide full support for the UMM-Collection Profile through the evaluation and reporting of metadata completeness with respect to the UMM-Collection Profile.

UMM-Collection Required Concepts

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