Data Discovery (ACDD)

From Earth Science Information Partners (ESIP)

The netCDF Group at Unidata recommended a set of netCDF attributes (the NetCDF Attribute Convention for Dataset Discovery) to enable data discovery nearly a decade ago. This convention was designed to augment the Climate-Forecast conventions that were already being used to ease access to data in netCDF by tools. The ACDD was adopted as the basis for the ncISO tool developed at NGDC and incorporated into THREDDS with the goal of providing ISO 19115-compliant discovery metadata for datasets in THREDDS that supported the ACDD. The governance of these conventions has since been taken over by the ESIP Documentation Cluster.

This page includes ACDD recommendations at three levels: highly recommended, recommended, and suggested.

Attribute Convention for Data Discovery - Highly Recommended

These attributes are highly recommended by the Attribute Convention for Data Discovery

Source: ACDD Home Page

ConceptDescriptionDialect (Fit) Paths
Resource TitleA short description of the resource. The title should be descriptive enough so that when a user is presented with a list of titles the general content of the data set can be determined.DIF /dif:DIF/dif:Entry_Title
DIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_Title
ECHO /*/echo:ShortName>/*/echo:LongName
ECS /*/ecs:ShortName > /*/ecs:LongName
DCAT dct:title
FGDC /fgdc:metadata/fgdc:idinfo/fgdc:citation/fgdc:citeinfo/fgdc:title
ISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:title/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:citation/cit:CI_Citation/cit:title/gco:CharacterString
AbstractA paragraph describing the resource.

Note: This concept is called "Desciption" in Catalog Services for the Web.
DIF /dif:DIF/dif:Summary/dif:Abstract
ECHO /*/echo:Description
ECS /*/ecs:CollectionDescription
DCAT dct:description
FGDC /fgdc:metadata/fgdc:idinfo/fgdc:descript/fgdc:abstract
ISO /*/gmd:identificationInfo/*/gmd:abstract/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:abstract/gco:CharacterString
KeywordA word or phrase that describes some aspect of a resource. Can be one of several types.

Note: The general identification keywords usually have a type of "theme" and are refered to as "theme keywords". Other types and vocabularies are used for other information. Service Entry Resource Format (SERF) requires a Science and a Service GCMD Keyword. This concept is called "Subject" in the CSW Specification.
DIF (1) /dif:DIF/dif:Parameters/dif:Category
DIF (1) /dif:DIF/dif:Parameters/dif:Topic
DIF (1) /dif:DIF/dif:Parameters/dif:Term
DIF (1) /dif:DIF/dif:Parameters/dif:Variable_Level_1
DIF (1) /dif:DIF/dif:Parameters/dif:Variable_Level_2
DIF (1) /dif:DIF/dif:Parameters/dif:Variable_Level_3
DIF (1) /dif:DIF/dif:Parameters/dif:Detailed_Variable
ECHO (1) /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:CategoryKeyword
ECHO (1) /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:TopicKeyword
ECHO (1) /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:TermKeyword
ECHO (1) /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:VariableLevel1Keyword/echo:Value
ECHO (1) /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:VariableLevel2Keyword/echo:Value
ECHO (1) /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:VariableLevel3Keyword
ECHO (1) /*/echo:ScienceKeywords/echo:ScienceKeyword/echo:DetailedVariableKeyword
ECS (1) /*/ecs:DisciplineTopicParameters/ecs:DisciplineKeyword
ECS (1) /*/ecs:DisciplineTopicParameters/ecs:TopicKeyword
ECS (1) /*/ecs:DisciplineTopicParameters/ecs:TermKeyword
ECS (1) /*/ecs:DisciplineTopicParameters/ecs:VariableKeyword
DCAT dct:keyword
FGDC (1) /fgdc:metadata/fgdc:idinfo/fgdc:keywords/fgdc:theme/fgdc:themekey
ISO (1) /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='theme']/gmd:keyword/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[mri:type/mri:MD_KeywordTypeCode='theme']/mri:keyword/gco:CharacterString


Attribute Convention for Data Discovery - Recommended

These attributes are recommended by the Attribute Convention for Data Discovery

Source: ACDD Home Page

ConceptDescriptionDialect (Fit) Paths
Resource IdentifierIdentifier for the resource described by the metadataDIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_DOI
ECHO /*/echo:DataSetId
ECHO (1) /*/echo:ShortName | /*/echo:LongName
ECS /ecs:LocalGranuleID
ISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:code/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:citation/cit:CI_Citation/cit:identifier/mcc:MD_Identifier/mcc:code/gco:CharacterString
Naming AuthorityThe organization responsible for the maintenance of the identifier (namespace)

Note: DIF and ECHO use the Global Change Master Directory (GCMD) keywords.
ISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:authority
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:citation/cit:CI_Citation/cit:identifier/mcc:MD_Identifier/mcc:codeSpace/gco:CharacterString
Keyword VocabularyIf you are following a guideline or using a shared vocabulary for the words/phrases in your "keywords" attribute, put the name of that guideline here.

Note: DIF, ECHO and ECS require that theme keywords come from the Global Change Master Directory list.
ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords[gmd:type/gmd:MD_KeywordTypeCode='theme']/gmd:thesaurusName/gmd:CI_Citation/gmd:title/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[mri:type/mri:MD_KeywordTypeCode='theme']/mri:thesaurusName/cit:CI_Citation
Common Data Model DatatypeThe THREDDS data type for this resource.

Note: Current values: vector, grid, textTable, tin, stereoModel, video.
ISO /*/gmd:identificationInfo/*/gmd:spatialRepresentationType/gmd:MD_SpatialRepresentationTypeCode
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:spatialRepresentationType/mcc:MD_SpatialRepresentationTypeCode
Lineage StatementInformation and references for sources and processes that were used to create the dataset and an audit trail for modifications to the original data.ISO /*/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:lineage/gmd:LI_Lineage/gmd:statement/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:resourceLineage/mrl:LI_Lineage/mrl:statement/gco:CharacterString
Resource Creation/Revision DateThe date the resource was createdDIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_Release_Date
ECHO /*/echo:InsertTime
ECHO /*/echo:LastUpdate
ECS /*/ecs:RevisionDate
DCAT dct:modified
ISO //gmd:CI_Citation/gmd:date/gmd:CI_Date[gmd:dateType/gmd:CI_DateTypeCode='creation']/gmd:date/gco:Date
ISO //gmd:CI_Citation/gmd:date/gmd:CI_Date[gmd:dateType/gmd:CI_DateTypeCode='creation']/gmd:date/gco:DateTime
ISO //gmd:CI_Citation/gmd:date/gmd:CI_Date[gmd:dateType/gmd:CI_DateTypeCode='revision']/gmd:date/gco:Date
ISO //gmd:CI_Citation/gmd:date/gmd:CI_Date[gmd:dateType/gmd:CI_DateTypeCode='revision']/gmd:date/gco:DateTime
ISO //gmd:CI_Citation/gmd:date/gmd:CI_Date[gmd:dateType/gmd:CI_DateTypeCode='publication']/gmd:date/gco:Date
ISO //gmd:CI_Citation/gmd:date/gmd:CI_Date[gmd:dateType/gmd:CI_DateTypeCode='publication']/gmd:date/gco:DateTime
ISO-1 //cit:CI_Citation/cit:date/cit:CI_Date[cit:dateType/cit:CI_DateTypeCode='creation']/cit:date/gco:DateTime
ISO-1 //cit:CI_Citation/cit:date/cit:CI_Date[cit:dateType/cit:CI_DateTypeCode='revision']/cit:date/gco:DateTime
ISO-1 //cit:CI_Citation/cit:date/cit:CI_Date[cit:dateType/cit:CI_DateTypeCode='publication']/cit:date/gco:DateTime
Resource ContactThe organization or person responsible for answering questions about the resource.DIF /dif:DIF/dif:Personnel[dif:Role='INVESTIGATOR']
ECHO /*/echo:Contacts/echo:Contact
ECS /CollectionMetaDataFile/CollectionMetaDataSets/Collections/CollectionMetaData/Contact[Role='User Services']
DCAT dct:contactPoint
ISO /*/gmd:identificationInfo/*/gmd:pointOfContact
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:pointOfContact
Author / Originator World Wide Web AddressThe World Wide Web mail address of the principal author of the cited resourceISO //gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty[gmd:role/gmd:CI_RoleCode = 'author']/gmd:contactInfo/gmd:CI_Contact/gmd:onlineResource/gmd:CI_OnlineResource/gmd:linkage/gmd:URL
ISO-1 //cit:CI_Citation/cit:citedResponsibleParty/cit:CI_Responsibility[cit:Role/cit:CI_RoleCode='publisher']/cit:party/cit:CI_Organisation/cit:contactInfo/cit:CI_Contact/cit:onlineResource/cit:CI_OnlineResource/cit:linkage
Author / Originator Email AddressThe electronic mail address of the principal author of the resourceDIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_Creator
DCAT dct:mbox
ISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty[gmd:role/gmd:CI_RoleCode = 'author']/gmd:contactInfo/gmd:CI_Contact/gmd:address/gmd:CI_Address/gmd:electronicMailAddress/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:citation/cit:CI_Citation/cit:citedResponsibleParty/cit:CI_Responsibility/cit:party/cit:CI_Individual/cit:contactInfo/cit:CI_Contact/cit:address/cit:CI_Address/cit:electronicMailAddress/gco:CharacterString
Originating OrganizationThe organization responsible for creating the resourceDIF /dif:DIF/dif:Originating_Center
ECHO /*/echo:ProcessingCenter
FGDC /fgdc:metadata/fgdc:distinfo/fgdc:distrib/fgdc:cntinfo/fgdc:cntperp/fgdc:cntorg
FGDC /fgdc:metadata/fgdc:idinfo/fgdc:citation/fgdc:citeinfo/fgdc:origin
ISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty[gmd:role/gmd:CI_RoleCode='author']/gmd:organisationName/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:citation/cit:CI_Citation/cit:citedResponsibleParty/cit:CI_Responsibility[cit:role/cit:CI_RoleCode='author']/cit:party/cit:CI_Organisation/cit:name/gco:CharacterString
Project NameThe name of the project that the resource was associated with.DIF /dif:DIF/dif:Project/dif:Short_Name
DIF /dif:DIF/dif:Project/dif:Long_Name
ECHO /*/echo:Campaigns/echo:Campaign/echo:ShortName and /*/echo:Campaigns/echo:Campaign/echo:LongName
ISO /*/gmd:identificationInfo/*/gmd:aggregationInfo/gmd:MD_AggregateInformation/gmd:aggregateDataSetName/gmd:CI_Citation/gmd:title/gco:CharacterString DS_AssociationTypeCode="largerWorkCitation" and DS_InitiativeTypeCode="project"
ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:keyword/gco:CharacterString with gmd:MD_KeywordTypeCode="project"
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:associatedResource/mri:MD_AssociatedResource[mri:initiativeType/mri:DS_InitiativeTypeCode='project']/mri:name/cit:CI_Citation/cit:title/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[mri:type/mri:MD_KeywordTypeCode='project']/mri:keyword/gco:CharacterString
Processing LevelA code that indicates the extent of processing done in the creation of a dataset.ECHO /*/echo:ProcessingLevelId
ECS /*/ecs:ProcessingLevelId
ISO /*/gmd:contentInfo/gmd:MD_ImageDescription/gmd:processingLevelCode/gmd:MD_Identifier/gmd:code/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:processingLevel/mcc:MD_Identifier/mcc:code/gco:CharacterString
AcknowledgementProvides a place to acknowledge various types of support for the project that produced the data.ISO /*/gmd:identificationInfo/*/gmd:credit/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:credit/gco:CharacterString>
Bounding BoxA bounding box for identifying a geographic area of interest

Note: This concept is called "Coverage" in the CSW Specification
DIF /dif:DIF/dif:Spatial_Coverage
ECHO /*/echo:Spatial/echo:HorizontalSpatialDomain/echo:Geometry/echo:BoundingRectangle
ECS /*/ecs:Spatial/ecs:HorizontalSpatialDomain/ecs:BoundingRectangle
FGDC /fgdc:metadata/fgdc:idinfo/fgdc:spdom/fgdc:bounding
ISO /*/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox
ISO /*/gmd:identificationInfo/srv:SV_ServiceIdentification/srv:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:geographicElement/gex:EX_GeographicBoundingBox
Southernmost LatitudeThe southernmost latitude of the bounding rectangle.

Note: OGC-SOS offering lists may not include the entire dataset. A gml:id attribute can be used to identify the bounding offering.
DIF (1) /dif:DIF/dif:Spatial_Coverage/dif:Southernmost_Latitude
ECHO (1) /*/echo:Spatial/echo:HorizontalSpatialDomain/echo:Geometry/echo:BoundingRectangle/echo:SouthBoundingCoordinate
ECS (1) /*/ecs:Spatial/ecs:HorizontalSpatialDomain/ecs:BoundingRectangle/ecs:SouthBoundingCoordinate
DCAT dct:spatial
FGDC (1) /fgdc:metadata/fgdc:idinfo/fgdc:spdom/fgdc:bounding/fgdc:southbc
ISO (1) /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:southBoundLatitude/gco:Decimal
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:geographicElement/gex:EX_GeographicBoundingBox/gex:southBoundLatitude/gco:Decimal
Northernmost LatitudeThe northernmost latitude of the bounding rectangle.

Note: OGC-SOS offering lists may not include the entire dataset. A gml:id attribute (e.g. gml:id="network-all") can be used to identify the bounding offering.
DIF (1) /dif:DIF/dif:Spatial_Coverage/dif:Northernmost_Latitude
ECHO (1) /*/echo:Spatial/echo:HorizontalSpatialDomain/echo:Geometry/echo:BoundingRectangle/echo:NorthBoundingCoordinate
ECS (1) /*/ecs:Spatial/ecs:HorizontalSpatialDomain/ecs:BoundingRectangle/ecs:NorthBoundingCoordinate
DCAT dct:spatial
FGDC (1) /fgdc:metadata/fgdc:idinfo/fgdc:spdom/fgdc:bounding/fgdc:northbc
ISO (1) /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:northBoundLatitude/gco:Decimal
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:geographicElement/gex:EX_GeographicBoundingBox/gex:northBoundLatitude/gco:Decimal
Westernmost LongitudeThe westernmost longitude of the bounding rectangle.

Note: OGC-SOS offering lists may not include the entire dataset. A gml:id attribute can be used to identify the bounding offering.
DIF (1) /dif:DIF/dif:Spatial_Coverage/dif:Westernmost_Longitude
ECHO (1) /*/echo:Spatial/echo:HorizontalSpatialDomain/echo:Geometry/echo:BoundingRectangle/echo:WestBoundingCoordinate
ECS (1) /*/ecs:Spatial/ecs:HorizontalSpatialDomain/ecs:BoundingRectangle/ecs:WestBoundingCoordinate
DCAT dct:spatial
FGDC (1) /fgdc:metadata/fgdc:idinfo/fgdc:spdom/fgdc:bounding/fgdc:westbc
ISO (1) /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:westBoundLongitude/gco:Decimal
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:geographicElement/gex:EX_GeographicBoundingBox/gex:westBoundLongitude/gco:Decimal
Easternmost LongitudeThe easternmost longitude of the bounding rectangle.

Note: OGC-SOS offering lists may not include the entire dataset. A gml:id attribute can be used to identify the bounding offering.
DIF (1) /dif:DIF/dif:Spatial_Coverage/dif:Easternmost_Longitude
ECHO (1) /*/echo:Spatial/echo:HorizontalSpatialDomain/echo:Geometry/echo:BoundingRectangle/echo:WestBoundingCoordinate
ECS (1) /*/ecs:Spatial/ecs:HorizontalSpatialDomain/ecs:BoundingRectangle/ecs:EastBoundingCoordinate
DCAT dct:spatial
FGDC (1) /fgdc:metadata/fgdc:idinfo/fgdc:spdom/fgdc:bounding/fgdc:eastbc
ISO (1) /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:eastBoundLongitude/gco:Decimal
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:geographicElement/gex:EX_GeographicBoundingBox/gex:eastBoundLongitude/gco:Decimal
Start TimeThe start of the bounding time periodDIF /dif:DIF/dif:Temporal_Coverage/dif:Start_Date
ECHO /*/echo:Temporal/echo:RangeDateTime/echo:BeginningDateTime
ECS /*/ecs:Temporal/ecs:RangeDateTime/ecs:RangeEndingDate
ECS /*/ecs:Temporal/ecs:RangeDateTime/ecs:RangeEndingTime
DCAT dct:temporal
ISO /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:beginPosition
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:temporalElement/gex:EX_TemporalExtent/gex:extent/gml:TimePeriod/gml:begin/gml:TimeInstant/gml:timePosition
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:temporalElement/gex:EX_TemporalExtent/gex:extent/gml:TimePeriod/gml:beginPosition
End TimeThe end of the bounding time periodDIF /dif:DIF/dif:Temporal_Coverage/dif:Stop_Date
ECHO /*/echo:Temporal/echo:RangeDateTime/echo:EndingDateTime
ECHO /*/echo:Temporal/echo:EndsAtPresentFlag
ECS /*/ecs:Temporal/ecs:RangeDateTime/ecs:RangeEndingDate
ECS /*/ecs:Temporal/ecs:RangeDateTime/ecs:RangeEndingTime
DCAT dct:temporal
ISO /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent/gmd:extent/gml:TimePeriod/gml:endPosition
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:temporalElement/gex:EX_TemporalExtent/gex:extent/gml:TimePeriod/gml:end/gml:TimeInstant/gml:timePosition
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:temporalElement/gex:EX_TemporalExtent/gex:extent/gml:TimePeriod/gml:endPosition
Vertical MinimumThe minimum height of the bounding rectangleDIF /dif:DIF/dif:Spatial_Coverage/dif:Minimum_Altitude
DIF /dif:DIF/dif:Spatial_Coverage/dif:Minimum_Depth
ISO /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:verticalElement/gmd:EX_VerticalExtent/gmd:minimumValue/gco:Real
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:verticalElement/gex:EX_VerticalExtent/gex:minimumValue/gco:Real
Temporal ExtentThe temporal extent of the resourceDIF /dif:Temporal Coverage
ECHO /*/Temporal/RangeDateTime
ECS /ecs:RangeBeginningDate
ECS /ecs:RangeEndingDate
FGDC /fgdc:metadata/fgdc:idinfo/fgdc:timeperd/fgdc:timeinfo/fgdc:rngdates
ISO /*/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:temporalElement/gmd:EX_TemporalExtent
ISO-1 /*/mri:MD_DataIdentification/mri:extent/gex:EX_Extent/gex:temporalElement/gex:EX_TemporalExtent
Temporal ResolutionThe smallest time step included in the resource.ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:temporalResolution/gts:TM_PeriodDuration
Standard Name VocabularyThe name of the shared vocabulary from which variable standard names are taken.ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords/gmd:thesaurusName/gmd:CI_Citation/gmd:title/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[mri:type/mri:thesaurusName/cit:CI_Citation/cit:title/gco:CharacterString
Vertical MaximumThe maximum height of the bounding rectangleDIF /dif:DIF/dif:Spatial_Coverage/dif:Maximum_Altitude
DIF /dif:DIF/dif:Spatial_Coverage/dif:Maximum_Depth
ISO /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:verticalElement/gmd:EX_VerticalExtent/gmd:maximumValue/gco:Real
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:verticalElement/gex:EX_VerticalExtent/gex:maximumValue/gco:Real
Resource Access ConstraintsInformation about any constraints for accessing the data set. This includes any special restrictions, legal prerequisites, limitations and/or warnings on obtaining the data set. Some words that may be used in this field include: Public, In-house, Limited, Additional detailed instructions on how to access the data can be entered in this field.DIF /dif:DIF/dif:Access_Constraints
ECHO /*/echo:RestrictionFlag
ECHO /*/echo:RestrictionComment
ECHO /*/echo:Visible
ECS /*/ecs:AccessConstraints
DCAT /dct:accessLevel
FGDC /fgdc:metadata/fgdc:idinfo/fgdc:accconst
ISO /*/gmd:identificationInfo/*/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:accessConstraints/gco:CharacterString
ISO /*/gmd:identificationInfo/*/gmd:resourceConstraints/gmd:MD_LegalConstraints/gmd:otherConstraints/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:resourceConstraints/mco:MD_LegalConstraints/mco:accessConstraints/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:resourceConstraints/mco:MD_LegalConstraints/mco:otherConstraints/gco:CharacterString


Attribute Convention for Data Discovery - Suggested

These attributes are suggested by the Attribute Convention for Data Discovery

Source: ACDD Home Page

ConceptDescriptionDialect (Fit) Paths
Contributor NameContributor to the resourceISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty[gmd:role/gmd:CI_RoleCode = 'manyOptions']/gmd:CI_Individual/gmd:name/gco:CharacterString
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:citation/cit:CI_Citation/cit:citedResponsibleParty/cit:CI_Responsibility[cit:role/cit:CI_RoleCode='manyOptions']/cit:party/cit:CI_Individual/cit:name/gco:CharacterString
Contributor RoleThe role of any individuals or institutions that contributed to the creation of the data.ISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:role/gmd:CI_RoleCode
ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:citation/cit:CI_Citation/cit:citedResponsibleParty/cit:CI_Responsibility/cit:role/cit:CI_RoleCode
PublisherPublisher of the cited resourceDIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_Publisher
DIF /dif:DIF/dif:Reference/dif:Publisher
DCAT dct:publisher
ISO //gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty[gmd:role/gmd:CI_RoleCode = 'publisher']/gmd:CI_Organisation/gmd:name/gco:CharacterString
ISO-1 //cit:CI_Citation/cit:citedResponsibleParty/cit:CI_Responsibility[cit:role/cit:CI_RoleCode='publisher']/cit:party/cit:CI_Organisation/cit:name/gco:CharacterString
Publisher URLWorld Wide Web address associated with the publisher of the cited resourceDIF /dif:DIF/dif:Reference/dif:Publication_Place
ISO //gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty[gmd:role/gmd:CI_RoleCode = ['publisher']/gmd:contactInfo/gmd:CI_Contact/gmd:onlineResource/gmd:CI_OnlineResource/gmd:linkage/gmd:URL
ISO-1 //cit:CI_Citation/cit:citedResponsibleParty/cit:CI_Responsibility[cit:role/cit:CI_RoleCode = ['publisher']/cit:party/*/cit:contactInfo/cit:CI_Contact/cit:onlineResource/cit:CI_OnlineResource/cit:linkage/gco:CharacterString
Publisher E-MailEmail associated with the publisher of the cited resourceDIF /dif:DIF/dif:Reference/dif:Publication_Place
ISO //gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty[gmd:role/gmd:CI_RoleCode = ['publisher']/gmd:contactInfo/gmd:address/gmd:CI_Address/gmd:electronicMailAddress/gco:CharacterString
ISO-1 //cit:CI_Citation/cit:citedResponsibleParty/cit:CI_Responsibility[cit:role/cit:CI_RoleCode = ['publisher']/cit:party/*/cit:contactInfo/cit:CI_Contact/cit:address/cit:CI_Address/cit:electronicMailAddress/gco:CharacterString

xPath Note: The xPaths included in this table use several wildcards. // means any path, so //gmd:CI_ResponsibleParty indicates a gmd:CI_ResponsibleParty anywhere in an XML file. /*/ indicates a single level with several possible elements. This usually indicates one of several concrete realizations of an abstract object. For example /*/gmd:identificationInfo could be gmd:MD_Metadata/gmd:identificationInfo or gmi:MI_Metadata/gmd:identificationInfo and gmd:identificationInfo/*/gmd:descriptiveKeywords could be gmd:identificationInfo/gmd:MD_DataIdentification/gmd:descriptiveKeywords or gmd:identificationInfo/srv:SV_ServiceIdentification/gmd:descriptiveKeywords. Fit: The fit of the dialect path with the concept is estimated on a scale of 1 = excellent two-way fit, 2 = one-way fit or some other problem, 3 - extension required.