The Metadata Dates element is used to identify dates when the metadata changed in some way. This element is made of two sub-elements, Type and Date. The Type describes what the date represents: a future review, when the metadata was created, last updated, or planned for deletion. The Date describes when the metadata had or will have the action performed on it as described by the Type element.
Each Metadata Date is accompanied by a Type. The Type must be selected from a controlled vocabulary list. There are four options available for Type:
Providing a Metadata Date is optional. Multiple Metadata Dates are allowed, however, the same date type should not be repeated more than once in the same record (for example, a CREATE and an UPDATE time can be provided, but two CREATE times cannot be provided in the same record). All dates should comply with the ISO 8601 Standard.
Examples:
Type = CREATE Date: 2010-02-01
Type = UPDATE Date: 2018-02-01
Type = REVIEW Date: 2019-02-01
Metadata Date is an optional field. Multiple Metadata Dates may be provided, if necessary (Cardinality 0..*)
Model | Element | Type | Usable Valid Values | Constraints | Required? | Cardinality | Notes |
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UMM-C | MetadataDate/Type | Enumeration | CREATE UPDATE REVIEW DELETE | n/a | No | 0..* | The same Type should not be used more than once in the same record. |
UMM-C | MetadataDate/Date | dateTime | n/a | n/a | No | 0..* | The actual date that the event associated with the metadata occurred/ will occur goes in this field. |
All metadata entering the CMR goes through the below process to ensure metadata quality requirements are met. All records undergo CMR validation before entering the system. The process of QA/QC is slightly different for NASA and non-NASA data providers. Non-NASA providers include interagency and international data providers and are referred to as the International Directory Network (IDN).
Please see the expandable sections below for flowchart details.
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ARC Automated Checks ARC uses the pyQuARC library for automated metadata checks. Please see the pyQuARC GitHub for more information. |
DIF 9 (Note: DIF-9 is being phased out and will no longer be supported after 2018) |
DIF 10Providing a Metadata_Creation date and Metadata_Last_Revision date is required in DIF 10. The Metadata_Future_Review and Metadata_Delete fields are optional. Multiple types of Metadata Dates may be provided, if necessary (Cardinality 1..*)
Value needed for translations: Not provided - The value of 'Not provided' might appear in the Metadata_Dates/Metadata_Creation and/or the Metadata_Dates/Metadata_Last_Revision fields as a result of software used to convert older versions of DIF to newer versions of DIF (such as 10.2 or 10.3). Required fields that are left empty in older versions of a DIF record are automatically populated with 'Not provided' when being converted to a new version, and both Metadata_Dates/Metadata_Creation and Metadata_Dates/Metadata_Last_Revision are required in the latest version of DIF. This value should not be used by metadata providers. Example Mapping
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ECHO 10Providing a Revision Date is optional in ECHO 10 (Cardinality: 0..1)
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ISO 19115-2 MENDSMetadata Date is an optional field. Multiple Metadata Dates may be provided, if necessary (Cardinality 0..*)
Enumeration/Code List Mapping
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ISO 19115-2 SMAPMetadata Date is an optional field. Multiple Metadata Dates may be provided, if necessary (Cardinality 0..*)
Enumeration/Code List Mapping
Example Mapping
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UMM Version 1.9.0 | Translation Direction | UMM Version 1.10.0 |
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Future Mappings
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Version | Date | What Changed |
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1.15.5 | 12/3/2020 | No changes were made for Metadata Dates during the transition from version 1.15.4 to 1.15.5 |
1.15.4 | 9/18/2020 | No changes were made for Metadata Dates during the transition from version 1.15.3 to 1.15.4 |
1.15.3 | 7/1/2020 | No changes were made for Metadata Dates during the transition from version 1.15.2 to 1.15.3 |
1.15.2 | 5/20/2020 | No changes were made for Metadata Dates during the transition from version 1.15.1 to 1.15.2 |
1.15.1 | 3/25/2020 | No changes were made for Metadata Dates during the transition from version 1.15.0 to 1.15.1 |
1.15.0 | 2/26/2020 | No changes were made for Metadata Dates during the transition from version 1.14.0 to 1.15.0 |
1.14.0 | 10/21/2019 | No changes were made for Metadata Dates during the transition from version 1.13.0 to 1.14.0 |
1.13.0 | 04/11/2019 | No changes were made for Metadata Dates during the transition from version 1.12.0 to 1.13.0 |
1.12.0 | 01/22/2019 | No changes were made for Metadata Dates during the transition from version 1.11.0 to 1.12.0. |
1.11.0 | 11/28/2018 | No changes were made for Metadata Dates during the transition from version 1.10.0 to 1.11.0. |
1.10.0 | 05/02/2018 | No changes were made for Metadata Dates during the transition from version 1.9.0 to 1.10.0. |
1.9.0 |
Version | Date | What Changed | Author |
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1.0 | 11/06/2018 | Recommendations/priority matrix transferred from internal ARC documentation to wiki space | Jeanne' le Roux |