Attribute Convention for Data Discovery Mappings
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These mappings are no longer normative—they represent the original relation of ACDD attributes to similar concepts in other specifications, but have not been updated for the latest changes.
ACDD Metadata Dialect Mappings
Many of these elements are included in the ISO 19115 Core specification. They are indicated in this Table by an M, O, or C in parentheses. An “M” indicates that the element is mandatory. An “O” indicates that the element is optional. A “C” indicates that the element is mandatory under certain conditions.
Highly Recommended
| Attribute | Description | THREDDS | ISO 19115-2 | OGC CSW | Rubric Category |
|---|---|---|---|---|---|
| title |
A short description of the dataset. |
dataset@name |
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:title/gco:CharacterString (M) |
Title | Text Search |
| summary |
A paragraph describing the dataset. |
metadata/documentation[@type="summary"] |
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:abstract/gco:CharacterString (M) |
Abstract | Text Search |
| keywords |
A comma separated list of key words and phrases. |
metadata/keyword |
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:keyword/gco:CharacterString |
Subject | Text Search |
Recommended
| Attribute | Description | THREDDS | ISO 19115-2 | OGC CSW | Rubric Category |
|---|---|---|---|---|---|
| id |
The
combination of the "naming authority" and the "id" should be a globally unique identifier for the dataset. |
dataset@id |
/gmi:MI_Metadata/gmd:fileIdentifier/gco:CharacterString (O) |
Identifier | Identifier |
| naming_authority |
|||||
| keywords_vocabulary |
If you are following a guideline for the words/phrases in your "keywords" attribute, put the name of that guideline here. |
metadata/keyword@vocabulary | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:thesaurusName/gmd:CI_Citation/gmd:title/gco:CharacterString |
Text Search | |
| cdm_data_type |
The THREDDS data type appropriate for this dataset. | metadata/dataType | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:spatialRepresentationType/gmd:MD_SpatialRepresentationTypeCode May need some extensions to this codelist. Current values: vector, grid, textTable, tin, stereoModel, video. |
Other | |
| history |
Provides an audit trail for modifications to the original data. | metadata/documentation[@type="history"] | /gmi:MI_Metadata/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:lineage/gmd:LI_Lineage/gmd:statement/gco:CharacterString (O) | Text Search | |
| comment |
Miscellaneous information about the data. | metadata/documentation |
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:supplementalInformation |
Text Search | |
| date_created | The date on which the data was created. |
metadata/date[@type="created"] | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date/gmd:date/gco:Date (M) /gmd:dateType/gmd:CI_DateTypeCode="creation" |
Responsible Party | |
| creator_name |
The data creator's name, URL, and email. The "institution" attribute will be used if the "creator_name" attribute does not exist. |
metadata/creator/name |
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:individualName/gco:CharacterString CI_RoleCode="originator" (O) |
Responsible Party | |
| creator_url |
metadata/creator/contact@url |
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:contactInfo/gmd:CI_Contact/gmd:onlineResource/gmd:CI_OnlineResource/gmd:linkage/gmd:URL |
Responsible Party | ||
| creator_email |
metadata/creator/contact@email | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:contactInfo/gmd:CI_Contact/gmd:address/gmd:CI_Address/gmd:electronicMailAddress/gco:CharacterString | Responsible Party | ||
| institution |
metadata/creator/name | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:organisationName/gco:CharacterString | Responsible Party | ||
| project |
The scientific project that produced the data. |
metadata/project |
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:keyword/gco:CharacterString and/or /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:aggregationInfo/gmd:MD_AggregateInformation/gmd:aggregateDataSetName/gmd:CI_Citation/gmd:title/gco:CharacterString DS_AssociationTypeCode="largerWorkCitation" and DS_InitiativeTypeCode="project" and/or /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:keyword/gco:CharacterString with gmd:MD_KeywordTypeCode="project" |
Responsible Party | |
| processing_level | A textual description of the processing (or quality control) level of the data. |
metadata/documentation[@type="processing_level"] | |||
| acknowledgement | A place to acknowledge various type of support for the project that produced this data. |
metadata/documentation[@type="funding"] | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:credit/gco:CharacterString | Responsible Party | |
| geospatial_bounds | Describes geospatial extent using any of the geometric objects (2D or 3D) supported by the Well-Known Text (WKT) format. | BoundingPolygon | Extent | ||
| geospatial_lat_min |
Describes a simple latitude/longitude bounding box. geospatial_lat_min specifies the southernmost latitude; geospatial_lat_max specifies the northernmost latitude; geospatial_lon_min specifies the westernmost longitude; geospatial_lon_max specifies the easternmost longitude of the bounding box. The values of geospatial_lon_min and geospatial_lon_max reflect the actual longitude data values. Cases where geospatial_lon_min is greater than geospatial_lon_max indicate the bounding box extends from geospatial_lon_max, through the longitude range discontinuity meridian (either the antimeridian or Prime Meridian), to geospatial_lon_min. For a more detailed geospatial coverage, see the suggested geospatial attributes. |
metadata/geospatialCoverage/northsouth/start |
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:southBoundLatitude/gco:Decimal |
BoundingBox | Extent |
| geospatial_lat_max | metadata/geospatialCoverage/northsouth/size | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:northBoundLatitude/gco:Decimal |
BoundingBox | Extent | |
| geospatial_lon_min | metadata/geospatialCoverage/eastwest/start | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:westBoundLongitude/gco:Decimal |
BoundingBox | Extent | |
| geospatial_lon_max | metadata/geospatialCoverage/eastwest/size | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:eastBoundLongitude/gco:Decimal |
BoundingBox | Extent | |
| geospatial_vertical_min |
Describes a simple vertical bounding box. For a more detailed geospatial coverage, see the suggested geospatial attributes. | metadata/geospatialCoverage/updown/start | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:verticalElement/gmd:EX_VerticalExtent/gmd:minimumValue/gco:Real | Extent | |
| geospatial_vertical_max | metadata/geospatialCoverage/updown/size | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:verticalElement/gmd:EX_VerticalExtent/gmd:maximumValue/gco:Real | Extent | ||
| time_coverage_start | Describes the temporal coverage of the data as a time range. | metadata/timeCoverage/start | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:beginPosition | Extent | |
| time_coverage_end | metadata/timeCoverage/end | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:endPosition | Extent | ||
| time_coverage_duration | metadata/timeCoverage/duration | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:beginPosition provides an ISO8601 compliant description of the time period covered by the dataset. This standard supports descriptions of durations. | Extent | ||
| time_coverage_resolution | metadata/timeCoverage/resolution | Extent | |||
| standard_name_vocabulary |
The name of the controlled vocabulary from which variable standard names are taken. |
metadata/variables@vocabulary | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:thesaurusName/gmd:CI_Citation/gmd:title/gco:CharacterString |
Text Search | |
| license | Describe the restrictions to data access and distribution. | metadata/documentation[@type="rights"] | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:useLimitation/gco:CharacterString |
Suggested
| Attribute | Description | THREDDS | ISO 19115-2 | OGC CSW | Rubric Category |
|---|---|---|---|---|---|
| contributor_name |
The name and role of any individuals or institutions that contributed to the creation of this data. |
metadata/contributor |
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:individualName/gco:CharacterString |
Responsible Party | |
| contributor_role |
metadata/contributor@role | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:role/gmd:CI_RoleCode ="principalInvestigator" | "author" |
Responsible Party | ||
| publisher_name |
The data publisher's name, URL, and email. The publisher may be an individual or an institution. | metadata/publisher/name |
/gmi:MI_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributorContact/gmd:CI_ResponsibleParty/gmd:organisationName/gco:CharacterString and/or /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:individualName/gco:CharacterString CI_RoleCode="publisher" and/or /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:keyword/gco:CharacterString with gmd:MD_KeywordTypeCode="dataCenter" |
Responsible Party | |
| publisher_url |
metadata/publisher/contact@url |
/gmi:MI_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributorContact/gmd:CI_ResponsibleParty/gmd:contactInfo/gmd:CI_Contact/gmd:onlineResource/gmd:CI_OnlineResource/gmd:linkage/gmd:URL and/or /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:contactInfo/gmd:CI_Contact/gmd:onlineResource/gmd:CI_OnlineResource/gmd:linkage/gmd:URL CI_RoleCode="publisher" |
Responsible Party | ||
| publisher_email |
metadata/publisher/contact@email | /gmi:MI_Metadata/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributorContact/gmd:CI_ResponsibleParty/gmd:contactInfo/gmd:CI_Contact/gmd:address/gmd:CI_Address/gmd:electronicMailAddress/gco:CharacterString and/or /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:contactInfo/gmd:CI_Contact/gmd:address/gmd:CI_Address/gmd:electronicMailAddress/gco:CharacterString CI_RoleCode="publisher" |
Responsible Party | ||
| date_modified |
The date on which this data was last modified. |
metadata/date[@type="modified"] | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date/gmd:date/gco:Date /gmd:dateType/gmd:CI_DateTypeCode="revision" |
Modified | Responsible Party |
| date_issued |
The date on which this data was formally issued. |
metadata/date[@type="issued"] | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:date/gmd:CI_Date/gmd:date/gco:Date /gmd:dateType/gmd:CI_DateTypeCode="publication" |
Responsible Party | |
| geospatial_lat_units |
Further refinement of the geospatial bounding box can be provided by using these units and resolution attributes. |
metadata/geospatialCoverage/northsouth/units | /gmi:MI_Metadata/gmd:spatialRepresentationInfo/gmd:MD_Georectified/gmd:axisDimensionProperties/gmd:MD_Dimension/gmd:resolution/gco:Measure/@uom | Extent | |
| geospatial_lat_resolution | metadata/geospatialCoverage/northsouth/resolution | /gmi:MI_Metadata/gmd:spatialRepresentationInfo/gmd:MD_Georectified/gmd:axisDimensionProperties/gmd:MD_Dimension/gmd:resolution/gco:Measure | Extent | ||
| geospatial_lon_units |
metadata/geospatialCoverage/eastwest/units | /gmi:MI_Metadata/gmd:spatialRepresentationInfo/gmd:MD_Georectified/gmd:axisDimensionProperties/gmd:MD_Dimension/gmd:resolution/gco:Measure/@uom | Extent | ||
| geospatial_lon_resolution | metadata/geospatialCoverage/eastwest/resolution | /gmi:MI_Metadata/gmd:spatialRepresentationInfo/gmd:MD_Georectified/gmd:axisDimensionProperties/gmd:MD_Dimension/gmd:resolution/gco:Measure | Extent | ||
| geospatial_vertical_units |
metadata/geospatialCoverage/updown/units | /gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:verticalElement/gmd:EX_VerticalExtent/gmd:verticalCRS | Extent | ||
| geospatial_vertical_resolution |
metadata/geospatialCoverage/updown/resolution |
Extent | |||
| geospatial_vertical_positive |
metadata/geospatialCoverage@zpositive |
Extent |
Highly Recommended Variable Attributes
| Attribute | Description | THREDDS | ISO 19115-2 |
|---|---|---|---|
| long_name | A long descriptive name for the variable (not necessarily from a controlled vocabulary). | metadata/variables/variable@vocabulary_name | At present the ISO 19115-2 Standard supports only one name for a variable. Standard names can be provided as keywords with the appropriate thesaurus. |
| standard_name |
A long descriptive name for the variable taken from a controlled vocabulary of variable names. | metadata/variables/variable@vocabulary_name | |
| units | The units of the variables data values. This attributes value should be a valid udunits string. | metadata/variables/variable@units | /gmi:MI_Metadata/gmd:contentInfo/gmi:MI_CoverageDescription/gmd:dimension/gmd:MD_Band/gmd:units |
| coverage_content_type | An ISO 19115-1 code to indicate the source of the data. | The valid values in the MD_CoverageContentTypeCode list are image, thematicClassification, physicalMeasurement, auxiliaryInformation, qualityInformation, referenceInformation, modelResult, coordinate |
