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Table of Contents
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Element Description

Note: this wiki page is a draft/ work in progress

The Purpose element is used to suggest usage or purpose contains suggested usage for the collection data or serviceand/or a description for why the resource exists. Any limitations on the resource (including, but not limited to, special restrictions, legal prerequisites, and terms and conditions) should be placed into the Use Constraints element and not into the Purpose element.

Best Practices

The Purpose element is optional. It can be leveraged to communicate to a user the broad applications the data is designed to be used for, and/or why the data were generated. 

Examples:

"To assess species composition, abundance, distribution and biomass of zooplankton within the Bering and Chukchi Seas, 1985-1989."

"To provide VIIRS 375m resolution active fire locations in Near Real-Time in easy to use formats."

"To serve a wide user community by providing composite Landsat images and raw data for urban areas that can be used in interdisciplinary studies of remote sensing and the environment."


Element Specification

ModelElementTypeConstraintsRequired?Cardinality
UMM-CPurpose String

1 - 1000 10000 characters

No0..1

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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Please see the expandable sections below for flowchart details.


Expand
titleGCMD Metadata QA/QC
  • Manual Review
    • Check that the purpose description is appropriate for the dataset.
  • Automated Review
    • Check that the field has been populated.
    • Check that the field length is not greater than 1000 characters.
Expand
titleCMR Validation
<>
  • If this element is used, it must contain at least 1 character and be no longer than 10000 characters in length
Expand
titleARC Metadata QA/QC

ARC Priority Matrix

Priority CategorizationJustification

Red = High Priority Finding

This element is categorized as highest priority when:

  • The Purpose contains spelling or grammatical errors.
  • The Purpose is incorrect for the data (for example, a copy and paste error could result in the purpose for a different dataset to appear in this field).
  • A broken URL is provided in the Purpose element.

Yellow = Medium Priority Finding

  • n/a

This element is categorized as medium priority when:

  • n/a
  • The information provided in the Purpose element is better suited for a different metadata field (i.e. incorrect usage of the Purpose field).

Blue = Low Priority Finding

This element is categorized as low priority when:

n/a

  • A link provided in the Purpose element needs to be updated from 'http' to 'https'.

Green = No Findings/Issues

The element is provided , and follows all applicable criteria specified in the best practices section above.

ARC Automated Rules

If novalue is provided, return is "np"
  • Otherwise, return is "OK"

    • Checks

    ARC uses the pyQuARC library for automated metadata checks. Please see the pyQuARC GitHub for more information.  

    Dialect Mappings

    Expand
    titleDIF 9

    DIF 9 (Note: DIF-9 is being phased out and will no longer be supported after 2018)

    Expand
    titleDIF 10

    DIF 10

    Purpose is an optional element. Purpose can only be provided once (Cardinality: 0..1)

    UMM-C ElementDIF 10

    		Specification
    PathTypeConstraintsRequired in DIF 10?Cardinality
    DIF 10
    PurposeSummary/Purpose

    String

    n/a
    1 - 10000 characters

    No

    		0..1


    Example Mapping

    Section
    Column
    width50%

    DIF 10

    No Format
     </Abstract><Summary>
 <Purpose>
	To<Purpose>To test the feasibility of creating a comparative index of national-level environmental sustainability. 
 </Purpose>
</Summary>
    Column
    width50%

    UMM

    No Format
    "Purpose":"Science Research"
   "To test the feasibility of creating a comparative index of national-level environmental sustainability."
    Expand
    titleECHO 10

    ECHO 10

    Suggested Usage is an optional element. Suggested Usage can only be provided once (Cardinality: 0..1)

    UMM-C ElementECHO 10

    		Specification
    PathTypeConstraintsRequired in ECHO10?CardinalityNotes
    ECHO 10
    Purpose
    Suggested Usage
    SuggestedUsageString

    1 - 4000 characters

    		No0..1

    The ECHO 10 schema definition for Suggested Usage: "This attribute describes how this


    collection or granule may be best used to support

    earth

    Earth science/global change research."


    Example Mapping

    Section
    Column
    width50%

    ECHO 10

    No Format
    <SuggestedUsage>To serve a wide user community by providing composite Landsat images and raw data for urban areas that can be used in interdisciplinary studies of remote sensing and the environment.</SuggestedUsage>
    Column
    width50%

    UMM

    No Format
    "Purpose":"Science Research"
   "To serve a wide user community by providing composite Landsat images and raw data for urban areas that can be used in interdisciplinary studies of remote sensing and the environment."
    Expand
    titleISO 19115-2 MENDS

    ISO 19115-2 MENDS

    Purpose is an optional element. Purpose can only be provided once in CMR (Cardinality: 0..1)

    UMM-C Element

    ISO 19115-2 MENDS 

    		Specification

    Path

    		TypeNotes
    ISO 19115-2 MENDS
    Purpose/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:
    resourceConstraints/gmd:MD_LegalConstraints/gmd:useLimitation/
    purpose/gco:CharacterString

    String

    Maps to the UMM element UseConstraints/Description



    Example Mapping

    Section
    Column
    width50%

    ISO 19115-2 MENDS

    No Format
    <gmi:MI_Metadata>
  ...
  <gmd:identificationInfo>
    <gmd:MD_DataIdentification>
      ...
      <gmd:purpose>
        <gco:CharacterString>To provide VIIRS 375m resolution active fire locations in Near Real-Time in easy to use formats.</gco:CharacterString>
      </gmd:purpose>
      ...
    </gmd:MD_DataIdentification>
  </gmd:identificationInfo>
  ...
</gmi:MI_Metadata>
    Column
    width50%

    UMM

    No Format
    "UseConstraintsPurpose": {
   "To provide VIIRS 375m resolution active fire locations in Near Real-Time in easy to use formats."
    Expand
    titleISO 19115-2 SMAP

    ISO 19115-2 SMAP

    Purpose is an optional element. Purpose can only be provided once in CMR (Cardinality: 0..1)

    UMM-C Element

    ISO 19115-2 SMAP 

    		Specification

    Path

    		TypeNotes
    ISO 19115-2 SMAPPurpose/gmd:DS_Series/gmd:seriesMetadata/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:useLimitation/purpose/gco:CharacterString

    String

    Maps to the UMM element UseConstraints/Description



    Example Mapping

    Section
    Column
    width50%

    ISO 19115-2 SMAP

    No Format
    <gmd:DS_Series>
  <gmd:seriesMetadata>
    <gmi:MI_Metadata>
      ...
      <gmd:identificationInfo>
        <gmd:MD_DataIdentification>
          ...        
          <gmd:purpose>
            <gco:CharacterString>To provide VIIRS 375m resolution active fire locations in Near Real-Time in easy to use formats.</gco:CharacterString>
          </gmd:purpose>
          ...
        </gmd:MD_DataIdentification>
      </gmd:identificationInfo>
      ...
    </gmi:MI_Metadata>
  </gmd:seriesMetadata>
</gmd:DS_Series>
    Column
    width50%

    UMM

    No Format
    "UseConstraintsPurpose": {
   "To provide VIIRS 375m resolution active fire locations in Near Real-Time in easy to use formats."

    UMM Migration

    UMM Version 1.9.0Translation DirectionUMM Version 1.10.0

    None

    Excerpt
    hiddentrue

    Future Mappings

    Expand
    titleISO 19115-1

    ISO 19115-1

    Purpose is an optional element. Purpose can only be provided once in CMR (Cardinality: 0..1)

    		Specification
    UMM-C Element

    ISO 19115-1 Path

    		TypeNotes
    ISO 19115-1

    String

    Maps to the UMM element UseConstraints/Description
    Purpose/mdb:MD_Metadata/mdb:identificationInfo/mri:MD_DataIdentification/mri:purpose/gco:CharacterString 

    String



    Example Mapping

    Section
    Column
    width50%

    ISO 19115-1

    No Format
    tbd
    <mdb:MD_Metadata>
  ...
  <mdb:identificationInfo>
    <mri:MD_DataIdentification>
      ...
      <mri:purpose>
        <gco:CharacterString>To provide VIIRS 375m resolution active fire locations in Near Real-Time in easy to use formats.</gco:CharacterString>
      </mri:purpose>
      ...
    </mri:MD_DataIdentification>
  </mdb:identificationInfo>
  ...
</mdb:MD_Metadata>
    Column
    width50%

    UMM

    No Format
    "
    UseConstraints
    Purpose":
    { 
     "To provide VIIRS 375m resolution active fire locations in Near Real-Time in easy to use formats."

    History

    UMM Versioning

    VersionDateWhat Changed
    1.15.512/3/2020No changes were made for Purpose during the transition from version 1.15.4 to 1.15.5
    1.15.49/18/2020No changes were made for Purpose during the transition from version 1.15.3 to 1.15.4
    1.15.37/1/2020No changes were made for Purpose during the transition from version 1.15.2 to 1.15.3
    1.15.25/20/2020No changes were made for Purpose during the transition from version 1.15.1 to 1.15.2
    1.15.13/25/2020No changes were made for Purpose during the transition from version 1.15.0 to 1.15.1
    1.15.02/26/2020No changes were made for Purpose during the transition from version 1.14.0 to 1.15.0
    1.14.010/21/2019No changes were made for Purpose during the transition from version 1.13.0 to 1.14.0
    1.13.004/11/2019No changes were made for Purpose during the transition from version 1.12.0 to 1.13.0
    1.12.001/22/2019No changes were made for Purpose during the transition from version 1.11.0 to 1.12.0.
    1.11.011/28/2018No changes were made for Purpose during the transition from version 1.10.0 to 1.11.0.
    1.10.0505/202/2018

    No changes were made for Purpose during the transition from version 1.9.0 to 1.10.0.

    ARC Documentation

    VersionDateWhat ChangedAuthor
    1.0910/2805/182018Recommendations/priority matrix transferred from internal ARC documentation to wiki spaceJeanne' le Roux