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Element Description
The science keyword elements enable the specification of Science Keywords element allows relevant Earth science keywords related to the data set. The science keywords to be associated with a dataset to better enable data search and discovery. The Science Keywords are chosen from a controlled keyword hierarchy maintained in the Keyword Management System (KMS) and are important for the precise search and retrieval of data. A list of valid science keywords Science Keywords can be found here: https://gcmdservicesgcmd.gsfcearthdata.nasa.gov/statickms/kmsconcepts/sciencekeywordsconcept_scheme/sciencekeywords.csv? ?format=csv.
(It is important to note that the "EARTH SCIENCE SERVICES" keywords included at the top of the list in the csv file should not be used as Science Keywords. Valid Science Keywords start with the "EARTH SCIENCE" Category).
Best PracticesBest Practices
Science keywords are important for the precise search and retrieval of data , and should accurately represent the data set dataset being described. As a rule of thumb, science keywords should represent the scientific parameters being provided in the data as well as any broader conceptual terms that may aid in describing the data. At a minimum, one science keyword hierarchy must be provided, and this hierarchy must go down to the 'Term' level of detail. The 'Detailed Variable' element is the only science keyword element that is not controlled by the KMS. The 'Detailed Variable' keyword should only be used if there is a very specific parameter provided in the data which is not adequately described by keywords in the KMS. If a particular science keyword is missing from the KMS, it is possible to put in a request to have it added. The KMS is managed by the Global Change Master Directory (GCMD) and new keyword requests may be made through the GCMD Keywords Community Forum.
All positions in the science keyword hierarchy must be populated until the desired level of detail is reached. Skipping or leaving blank a position in the keyword hierarchy will render the keyword invalid. The only exception to this is the 'Detailed Variable' element; a Detailed Variable keyword may be provided as long as it is preceded by the required Category, Topic, and Term keywords. Science keywords are not case sensitive.
Examples:
ScienceKeywords/Category: "EARTH SCIENCE"
ScienceKeywords/Topic: "ATMOSPHERE"
ScienceKeywords/Term: "CLOUDS"
ScienceKeywords/VariableLevel1: "TROPOSPHERIC/LOW LEVEL CLOUDS (OBSERVED/ANALYZED)"
ScienceKeywords/VariableLevel2: "STRATOCUMULUS"
ScienceKeywords/VariableLevel3: "STRATOCUMULUS CUMILIFORMIS"
ScienceKeywords/DetailedVariable: "STRATOCUMULUS VESPERALIS"
ScienceKeywords/Category: "EARTH SCIENCE"
ScienceKeywords/Topic: "BIOSPHERE"
ScienceKeywords/Term: "ECOLOGICAL DYNAMICS"
ScienceKeywords/VariableLevel1: "FIRE ECOLOGY"
ScienceKeywords/VariableLevel2: "FIRE MODELS"
Element Specification
An unlimited amount of science keywords may be listed One Science Keyword is required and more Science Keywords may be provided (Cardinality: 1..*). For every science keyword that is provided the sub elements of Category, Topic, and Term are required.
Model | Element | Type | Usable Valid Values | Constraints | Required? | Cardinality |
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UMM-C | ScienceKeywords/Category | String | Science Category Keywords | KMS controlled | Yes | 1 |
UMM-C | ScienceKeywords/Topic | String | Science Topic Keywords | KMS controlled | Yes | 1 |
UMM-C | ScienceKeywords/Term | String | Science Term Keywords | KMS controlled | Yes | 1 |
UMM-C | ScienceKeywords/VariableLevel1 | String | Science Variable_Level_1 Keywords | KMS controlled | No | 0..1 |
UMM-C | ScienceKeywords/VariableLevel2 | String | KMS controlled | No | 0..1 | |
UMM-C | ScienceKeywords/VariableLevel3 | String | KMS controlled | No | 0..1 | |
UMM-C | ScienceKeywords/DetailedVariable | String |
1 - 80 characters (Uncontrolled/Free-Text) | No | 0..1 |
ARC Priority Matrix
This element is categorized as highest priority when:
- The element is not included at all.
- The element is included but is empty.
- The science keyword does not align with the KMS.
- The science keyword does not exist in KMS.
- A keyword(s) is missing from the hierarchy.
- A keyword(s) is placed in the incorrect position of the hierarchy (e.g. a Variable Level 2 keyword is placed in the Variable Level 1 field).
- The science keyword is not appropriate for the dataset.
This element is categorized as medium priority when:
- A recommendation is made to add a relevant science keyword to the metadata.
- A recommendation is made to add to an existing keyword in the metadata (i.e. i.e. to extend a keyword hierarchy down to a more detailed keyword).
Not Applicable
Dialect Mappings
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DIF 9 (Note: DIF-9 is being phased out and will no longer be supported after 2018) |
Metadata Validation and QA/QC
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).
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ARC Automated Checks ARC uses the pyQuARC library for automated metadata checks. Please see the pyQuARC GitHub for more information. |
Dialect Mappings
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DIF 9 (Note: DIF-9 is being phased out and will no longer be supported after 2018) |
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DIF 10Science_Keywords are required. An unlimited amount of Science Keywords may be provided (Cardinality: 1..*)
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DIF 10 An unlimited amount of science keywords may be listed (Cardinality: 1..*) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Specification | Path | Type | Constraints | Required in DIF 10? | Cardinality | Notes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
DIF 10 | /DIF/Science_Keywords/Category | String | KMS controlled | Yes | 1 | The category keyword will always be "EARTH SCIENCE" | DIF 10 | /DIF/Science_Keywords/Topic | String | KMS controlled | Yes | 1 | DIF 10 | /DIF/Science_Keywords/Term | String | KMS controlled | Yes | 1 | DIF 10 | /DIF/Science_Keywords/Variable_Level_1 | String | KMS controlled | No | 0..1 | DIF 10 | /DIF/Science_Keywords/Variable_Level_2 | String | KMS controlled | No | 0..1 | DIF 10 | /DIF/Science_Keywords/Variable_Level_3 | String | KMS controlled | No | 0..1 | DIF 10 | /DIF/Science_Keywords/Detailed_Variable | String | No | 0..1 |
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ECHO 10Science Keywords are required. An unlimited amount of Science Keywords may be provided | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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ECHO 10 An unlimited amount of science keywords may be listed (Cardinality: 1..*)
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ISO 19115-2 MENDSAn Science Keywords are required. An unlimited amount of science keywords Science Keywords may be listed provided (Cardinality: 1..*)
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ISO 19115-2 SMAPScience Keywords are required. An unlimited amount of science keywords Science Keywords may be listed provided (Cardinality: 1..*)
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ISO 19115-2 SMAP |
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UMM Migration
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UMM Migration
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Future Mappings
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Future Mappings
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ISO 19115-1Science Keywords are required. An unlimited amount of Science Keywords may be provided (Cardinality: 1..*)
Example Mapping
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History
UMM Versioning
Version | Date | What Changed |
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1.15.5 | 12/3/2020 | No changes were made for Science Keywords during the transition from version 1.15.4 to 1.15.5 |
1.15.4 | 9/18/2020 | No changes were made for Science Keywords during the transition from version 1.15.3 to 1.15.4 |
1.15.3 | 7/1/2020 | No changes were made for Science Keywords during the transition from version 1.15.2 to 1.15.3 |
1.15.2 | 5/20/2020 | No changes were made for Science Keywords during the transition from version 1.15.1 to 1.15.2 |
1.15.1 | 3/25/2020 | No changes were made for Science Keywords during the transition from version 1.15.0 to 1.15.1 |
1.15.0 | 2/26/2020 | No changes were made for Science Keywords during the transition from version 1.14.0 to 1.15.0 |
1.14.0 | 10/21/2019 | No changes were made for Science Keywords during the transition from version 1.13.0 to 1.14.0 |
1.13.0 | 04/11/2019 | No changes were made for Science Keywords during the transition from version 1.12.0 to 1.13.0 |
1.12.0 | 01/22/2019 | No changes were made for Science Keywords during the transition from version 1.11.0 to 1.12.0. |
1.11.0 | 11/28/2018 | No changes were made for Science Keywords during the transition from version 1.10.0 to 1.11.0. |
1.10.0 | 05/02/2018 | No changes were made for Science Keywords during the transition from version 1.9.0 to 1.10.0. |
Future Mappings
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History
UMM Versioning
ARC Documentation
Version | Date | What Changed | Author |
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1.0 | 505/404/182018 | Recommendations/priority matrix transferred from internal ARC documentation to wiki space |