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The focus of this Case Study is to identify and compare the usage of metadata elements and attributes in CMR metadata collections as well as to identify and compare the completeness of UMM-Profile concepts in CMR metadata collections. The metadata usage studies include a comparison of NASA metadata with IDN and SciOps metadata as well as an evaluation of Commonly Used Documentation Objects (CUDOs).This work updates our prior analysis of CMR metadata in several important ways:

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2)     We added a new metric to our calculations that reports the % percent of records in a metadata group (e.g. DAAC) that include a concept or item. This provides important information for the collection managers as well as providing information on the usage of various metadata elements. For example, we can distinguish items that occur once in every record from those that occur multiple times in some records.

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We examined completeness of the NASA and IDN metadata groups with respect to the UMM-Collection recommendation. Nine of the fifteen required elements are complete in all these metadata collections , (see Table 1).

Table 1 - UMM Concept Percent Completeness in NASA Collections

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