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Table 2:

Identifiers in the CMR - No Attributes(Elements)

Identifier Identifiers in the CMR with (Items, Elements and Attributes)

Observations

• All CMR metadata collections include a Resource Identifier
• All CMR metadata collections include Instrument and Platform Identifiers
• Reference System identifiers are included in 25/26 CMR collections
• Operation identifiers are included in 22/26 CMR collections
• Sensor identifiers are included in 14 NASA metadata collections
• Geographic Identifier are included in 7 NASA metadata collections
• AggregationInformation Identifiers are included in 9 CMR metadata collections

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Table 3:

Citations in the CMR - No Attributes(Elements)

Citations in the CMR with (Items, Elements and Attributes)

Observations

• Instrument Citations are included in all CMR metadata collections

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The table below shows where Online Resource elements are used in CMR metadata collections.

Table 4:

Online Resources in the CMR (Elements)

Online Resources OnlineResources in the CMR (Items, Elements and Attributes)

Observations

• An Online Resource URL for Distributor Transfer Options exists in all CMR metadata collections with the exception of OMINRT
• An Online Resource URL for Keyword Thesaurus exists in 15/26 CMR metadata collections
• An Online Resource URL for the Metadata Contact  and Point Of Contact exists in 17/26 CMR metadata collections
• An Online Resource URL for Associated Resources exists in 7/26 CMR metadata collections
• An Online Resource URL for Distributor Contact exists in 11/26 CMR metadata collections
• An Online Resource URL for Processor Contact exists in 2 NASA metadata collections
• An Online Resource URL for Point Of Contact exists in 1 NASA metadata collections
  
  

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The table below shows where geographic elements are used in CMR metadata collections.

Table 5:

GeographicElements Geographic Extents in the CMR - No Attributes(Elements)

Geographic Extents GeographicElements in the CMR - With Attributes(Items, Elements and Attributes)

Observations

• Bounding Box extent elements are used in all CMR metadata collection with the exception of OMINRT
• 18 out of 26 CMR collection are using the extentTypeCode element with a value of 1
• 8 NASA collections are using the gmd:geographicIdentifier/gmd:description.  Commonly recurring values include:

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The table below shows where temporal elements are used in CMR metadata collections.

Table 6:

TemporalElements Temporal Extents in the CMR - No Attributes(Elements)

Temporal Extents TemporalElements in the CMR - With Attributes(Items, Elements and Attributes)

Observations

• All CMR collections include a TimePeriod begin position element, whereas 24 of 28 CMR collections include a TimePeriod end position element
• 7 CMR collections include a TimePeriod endPosition element with an attribute value of indeterminatePosition='Now'
• 1 CMR collection (SEDAC) is using the timePosition element with the most common @framevalue of 'Eastern-Daylight' and field value a DateTime value the likely begin time.
  
  

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The table below shows the usage of  Date elements are used in CMR metadata collections.

Table 7:

Dates in the CMR - No Attributes(Elements)

Dates in the CMR - With Attributes(Items, Elements and Attributes)

Observations

• All CMR metadata collections include a Metadata Creation/Modified Date (timeStamp element)
• All CMR metadata collection include a Resource Citation date
• 15 of 18 NASA collections include Keyword and Metadata Maintenance dates
• 7 CMR metadata collections include dates associated with related resources (aggregateDataSetName) element.

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Table 8:

Keywords in the CMR - No Attributes(Elements)

Keywords in the CMR - With (Elements and Attributes)

Observations

• All CMR collections include Keyword and KeywordTypeCode elements.
• 15 NASA collections include thesaurusName content for onlineResource and organisationName elements.

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Table 8:

Descriptions in the CMR - No Attributes(Elements)

Descriptions Keywords in the CMR - With (Elements and Attributes)

Observations

• All CMR collections include Platform descriptions and Resource Identifier descriptions.
• 15 NASA collections include thesaurusName content for onlineResource and organisationName elements.

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