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The CMR team (NASA and SciOps) are in the difficult position of trying to make a coherent and useful metadata repository by collecting metadata from many organizations and projects that have different goals and needs.  This presents a challenge as the CMR evolves and new requirements emerge. Metadata managers need to account for content that is not provided by the metadata providers. At the current time, this is between three and five percent of the content.

 Not Provided Values

The solution for both NASA provided collections and SciOps provided collection is to add the string “Not provided” to expected fields that have no content. This clearly indicates that content is missing, except that tools that read the metadata or translate it must be aware of and consider this convention to get meaningful results. The tools we use for evaluating metadata completeness are agnostic to element and attribute values.  Therefore the analysis presented below, which compares NASA Complete with SciOps Complete does not include metadata fields with a value of 'Not Provided'.  Below are the fields with 'Not Provided' values that were excluded from NASA Complete with SciOps Complete evaluation

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