Data Discovery (ECHO)

The NASA-developed Earth Observing System (EOS) Clearing House ([ECHO) is a spatial and temporal metadata registry and order broker built by NASA's Earth Science Data and Information System (ESDIS) that enables the science community to more easily use and exchange NASA's data and services. ECHO's main objective is to enable broader use of NASA's EOS data. ECHO allows users to more efficiently search and access data and services and increases the potential for interoperability with new tools and services. The value of these resources increases as the potential to exchange and interoperate increases. ECHO has been working with other organizations to provide their Earth science metadata alongside NASA's for users to search and access. ECHO stores metadata from a variety of science disciplines and domains, including Climate Variability and Change, Carbon Cycle and Ecosystems, Earth Surface and Interior, Atmospheric Composition, Weather, and Water and Energy Cycle.

The ECHO metadata model focuses on data discovery and includes two sets of recommendations: Mandatory Fields and Recommended Fields. These recommendations are listed here along with xPaths to the recommended concepts in many metadata dialects.

ECHO for Data Discovery - Mandatory

This recommendation includes the required fields from Section 4.2 of the ECHO Data Partner's User Guide (Version 10.7).

Source: ECHO Data Partner's User Guide Other ECHO Documentation

Concept	Description	Dialect (Fit) Paths
Resource Title	A 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.	ADIwg /adiwg:project/adiwg:idinfo/adiwg:citation/adiwg:citeinfo/adiwg:title DIF /dif:DIF/dif:Entry_Title DIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_Title DCAT /dct:title Dryad dcterms:title ECHO /*/echo:ShortName | /*/echo:LongName ECHO /*/echo:DataSetId ECS /*/ecs:ShortName | /*/ecs:LongName EML /eml:eml/eml:dataset/eml:title FGDC /fgdc:metadata/fgdc:idinfo/fgdc:citation/fgdc:citeinfo/fgdc:title HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Attribute[@Name='title']/hdf5:Data/hdf5:DataFromFile HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Attribute[@Name='LongName']/hdf5:Data/hdf5:DataFromFile 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 UMM /umm:UMM/umm:CollectionCitation/umm:Title OGC-SOS /sos:Capabilities/ows:ServiceIdentification/ows:Title SERF /serf:SERF/serf:Entry_Title THREDDS /thredds:catalog/thredds:dataset/@name THREDDS /thredds:catalog/thredds:dataset/thredds:metadata/dc:title THREDDS //thredds:dataset[1]/@name netCDF /nc:netcdf/nc:attribute[@nc:name=title]/@nc:value
Resource Version	Version of the cited resource	DIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_Version DIF /dif:DIF/dif:Reference/dif:Edition ECHO /*/echo:VersionId ECS /*/ecs:VersionId HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Attribute[@Name='VersionID']/hdf5:Data/hdf5:DataFromFile ISO /*/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:edition/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/mri:MD_DataIdentification/mri:citation/cit:CI_Citation/cit:edition/gco:CharacterString
Publication Date	Date of publication of the cited resource	DIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_Release_Date DIF /dif:DIF/dif:Reference/dif:Publication_Date DCAT /dct:issued Dryad dcterms:dateSubmitted ECHO /*/echo:InsertTime ECS /*ecs:CitationforExternalPublication EML /eml:eml/eml:dataset/eml:pubDate FGDC /fgdc:metadata/fgdc:idinfo/fgdc:citation/fgdc:citeinfo/fgdc:pubdate ISO //gmd:CI_Citation/gmd:date/gmd:CI_Date[normalize-space(gmd:dateType/gmd:CI_DateTypeCode)='publication']/gmd:date/gco:Date ISO //gmd:CI_Citation/gmd:date/gmd:CI_Date[normalize-space(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)='publication']/cit:date/gco:DateTime
Modified Date	Date on which the metadata record (not the resource) was created or updated within the catalogue.	DIF /dif:DIF/dif:Last_DIF_Revision_Date DCAT /dct:modified ECHO /*/echo:RevisionDate ECS /*/ecs:RevisionDate FGDC /fgdc:metadata/fgdc:metainfo/fgdc:metd ISO /*/gmd:dateStamp/gco:Date ISO /*/gmd:dateStamp/gco:DateTime ISO-1 /mdb:MD_Metadata/mdb:dateInfo/cit:CI_Date[cit:dateType/cit:CI_DateTypeCode='lastUpdate']/cit:date/gco:DateTime
Resource Long Name	The reference name used in describing the scientific contents of the data collection.	ECHO /*/echo:LongName ECS /*/ecs:LongName 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
Resource Identifier	Identifier for the resource described by the metadata	ADIwg /adiwg:project/adiwg:idinfo/adiwg:ids/adiwg:projguid DIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_DOI DCAT /dct:identifier ECHO /*/echo:DataSetId ECHO (1) /*/echo:ShortName | /*/echo:LongName ECS /ecs:LocalGranuleID EML /eml:eml/@packageId HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='INVENTORYMETADATA']/hdf5:Group[@Name='ProductSpecificMetadata']/hdf5:Attribute[@Name='identifier_file_uuid']/hdf5:Data/hdf5:DataFromFile HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Attribute[@Name='identifier_file_uuid']/hdf5:Data/hdf5:DataFromFile 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 THREDDS /thredds:catalog/thredds:dataset/@ID netCDF /nc:netcdf/nc:attribute[@nc:name=id]/@nc:value
Abstract	A paragraph describing the resource. Note: This concept is called "Desciption" in Catalog Services for the Web.	ADIwg /adiwg:project/adiwg:idinfo/adiwg:descript/adiwg:abstract DIF /dif:DIF/dif:Summary/dif:Abstract DCAT /dct:description Dryad dcterms:description ECHO /*/echo:Description ECS /*/ecs:CollectionDescription EML /eml:eml/eml:dataset/eml:abstract//* EML /eml:eml/eml:dataset/eml:abstract FGDC /fgdc:metadata/fgdc:idinfo/fgdc:descript/fgdc:abstract HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Attribute[@Name='summary']/hdf5:Data/hdf5:DataFromFile HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Attribute[@Name='CollectionDescription']/hdf5:Data/hdf5:DataFromFile ISO /*/gmd:identificationInfo/*/gmd:abstract/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:abstract/gco:CharacterString UMM /umm:UMM/umm:Summary OGC-SOS /sos:Capabilities/ows:ServiceIdentification/ows:Abstract SERF /serf:SERF/serf:Summary/serf:Abstract THREDDS //thredds:dataset/thredds:documentation[@type='abstract'] THREDDS //thredds:metadata/thredds:documentation[@type='abstract'] netCDF /nc:netcdf/nc:attribute[@nc:name='summary']/@nc:value
Ordering Instructions	General instructions, terms and services provided by the distributor	ECHO /*/echo:Orderable FGDC /fgdc:metadata/fgdc:distinfo/fgdc:distrib/fgdc:storder/fgdc:ordinst ISO /*/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributionOrderProcess/gmd:MD_StandardOrderProcess/gmd:orderingInstructions/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:distributionInfo/mrd:MD_Distribution/mrd:distributor/mrd:MD_Distributor/mrd:distributionOrderProcess/mrd:MD_StandardOrderProcess/mrd:orderingInstructions/gco:CharacterString
Resource Access Constraints	Information 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 DCAT /dct:accessLevel DCAT dct:accessLevelComment ECHO /*/echo:RestrictionFlag ECHO /*/echo:RestrictionComment ECHO /*/echo:Visible ECS /*/ecs:AccessConstraints EML /eml:eml/eml:access//* 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 SERF /serf:DIF/serf:Access_Constraints THREDDS /thredds:catalog/thredds:dataset/thredds:documentation[@type="rights"] THREDDS /thredds:catalog/thredds:metadata/thredds:documentation[@type="rights"] netCDF /nc:netcdf/nc:variable/nc:attribute[@nc:name=license]/@nc:value

ECHO for Data Discovery - Recommended

This recommendation includes the recommended fields from Section 4.2 of the ECHO Data Partner's User Guide (Version 10.7).

Source: ECHO Data Partner's User Guide Other ECHO Documentation

Concept	Description	Dialect (Fit) Paths
Processing Level	A 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 netCDF /nc:netcdf/nc:attribute[@nc:name=processing_level]/@nc:value
Resource Cost or Fees	Cost associated with access to the resource	DIF /dif:DIF/dif:Distribution/dif:Fees ECHO /*/echo:Price FGDC /fgdc:metadata/fgdc:distinfo/fgdc:distrib/fgdc:storder/fgdc:fees ISO /*/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributionOrderProcess/gmd:MD_StandardOrderProcess/gmd:fees/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:distributionInfo/mrd:MD_Distribution/mrd:distributionFormat/mrd:MD_Format/mrd:formatDistributor/mrd:MD_Distributor/mrd:distributionOrderProcess/mrd:MD_StandardOrderProcess/mrd:fees/gco:CharacterString OGC-SOS /sos:Capabilities/ows:ServiceIdentification/ows:Fees SERF /serf:SERF/serf:Distribution/serf:Fees
Place Keyword	A comma separated list of key words and phrases that give the location of the resource. Note: Some dialects include keywords, but they do not include mechanisms for identifying the type. In those cases it is difficult to unambiguously identify place keywords.	ADIwg /adiwg:project/adiwg:idinfo/adiwg:keywords/adiwg:place/adiwg:placekey DIF /dif:DIF/dif:Location/dif:Location_Category DIF /dif:DIF/dif:Location/dif:Location_Type DIF /dif:DIF/dif:Location/dif:Location_Subregion1 DIF /dif:DIF/dif:Location/dif:Location_Subregion2 DIF /dif:DIF/dif:Location/dif:Location_Subregion3 DIF /dif:DIF/dif:Location/dif:Detailed_Location FGDC /fgdc:metadata/fgdc:idinfo/fgdc:keywords/fgdc:place/fgdc:placekey HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Attribute[@Name='SpatialKeyword']/hdf5:Data/hdf5:DataFromFile ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords[normalize-space(gmd:type/gmd:MD_KeywordTypeCode)='place']/gmd:keyword/gco:CharacterString ISO /gmd:MD_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicDescription/gmd:geographicIdentifier/gmd:MD_Identifier/gmd:code/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[normalize-space(mri:type/mri:MD_KeywordTypeCode)='place']/mri:keyword/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:geographicElement/gex:EX_GeographicDescription/gex:geographicIdentifier/mcc:MD_Identifier/mcc:code/gco:CharacterString OGC-SOS /sos:Capabilities/ows:ServiceIdentification/ows:Keywords[ows:Type='place']/ows:Keyword THREDDS /thredds:catalog/thredds:dataset/thredds:geospatialCoverage/thredds:name
Temporal Keyword	Keyword identifies a time period related to the resource.	ECHO /*/echo:TemporalKeywords/echo:Keyword ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords[normalize-space(gmd:type/gmd:MD_KeywordTypeCode)='temporal']/gmd:keyword/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[normalize-space(mri:type/mri:MD_KeywordTypeCode)='temporal']/mri:keyword/gco:CharacterString
Temporal Extent	The temporal extent of the resource	DIF /dif:TemporalCoverage//* DCAT /dct:temporal ECHO /*/Temporal/RangeDateTime//* ECS /ecs:RangeBeginningDate ECS /ecs:RangeEndingDate EML /eml:eml/eml:dataset/eml:coverage/eml:temporalCoverage 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//* THREDDS /thredds:catalog/thredds:metadata/thredds:timeCoverage/thredds:duration] THREDDS /thredds:catalog/thredds:dataset/thredds:timeCoverage/thredds:duration] netCDF /nc:netcdf/nc:CFMetadata/nc:attribute[@nc:name=time_coverage_duration]/@nc:value
Resource Contact	The organization or person responsible for answering questions about the resource.	ADIwg /adiwg:project/adiwg:idinfo/adiwg:ptcontac/adiwg:cntinfo ADIwg /adiwg:project/adiwg:idinfo/adiwg:datacred/adiwg:credorg/adiwg:cntinfo ADIwg /adiwg:project/adiwg:idinfo/adiwg:datacred/adiwg:credper/adiwg:cntinfo DIF /dif:DIF/dif:Personnel[dif:Role='INVESTIGATOR'] DIF /serf:SERF/serf:Personnel[serf:Role='INVESTIGATOR'] DCAT /dct:contactPoint ECHO /*/ArchiveCenter ECHO /*/Contacts/Contact[contains(Role,'TECHNICAL CONTACT')] ECS /CollectionMetaDataFile/CollectionMetaDataSets/Collections/CollectionMetaData/Contact[Role='User Services'] EML /eml:eml/eml:dataset/eml:contact HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Attribute[@Name='creator_name']/hdf5:Data/hdf5:DataFromFile HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Group[@Name='ContactPerson'] HDF5.1 /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Group[@Name='ContactOrganization']/hdf5:Group[@Name='Data_Originator'] ISO /*/gmd:identificationInfo/*/gmd:pointOfContact ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:pointOfContact OGC-SOS /sos:Capabilities/ows:ServiceProvider SERF /serf:SERF/serf:Personnel THREDDS /thredds:catalog/thredds:dataset/thredds:creator/thredds:name netCDF /nc:netcdf/nc:attribute[@nc:name=creator_name]/@nc:value
Theme Keyword	A 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.	ADIwg /adiwg:project/adiwg:idinfo/adiwg:keywords/adiwg:theme/adiwg:themekey 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 DCAT /dct:keyword Dryad dcterms:subject 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 EML /eml:eml/eml:dataset/eml:keywordSet/eml:keyword FGDC /fgdc:metadata/fgdc:idinfo/fgdc:keywords/fgdc:theme/fgdc:themekey HDF5.1 (1) /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Attribute[@Name='keywords']/hdf5:Data/hdf5:DataFromFile HDF5.1 (1) /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Group[@Name='DisciplineTopicParameters']/hdf5:Group/hdf5:Attribute[@Name='ECSDisciplineKeyword']/hdf5:Data/hdf5:DataFromFile HDF5.1 (1) /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Group[@Name='DisciplineTopicParameters']/hdf5:Group/hdf5:Attribute[@Name='ECSTermKeyword']/hdf5:Data/hdf5:DataFromFile HDF5.1 (1) /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Group[@Name='DisciplineTopicParameters']/hdf5:Group/hdf5:Attribute[@Name='ECSTopicKeyword']/hdf5:Data/hdf5:DataFromFile HDF5.1 (1) /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Group[@Name='DisciplineTopicParameters']/hdf5:Group/hdf5:Attribute[@Name='ECSVariableKeyword']/hdf5:Data/hdf5:DataFromFile HDF5.1 (1) /hdf5:HDF5-File/hdf5:RootGroup/hdf5:Group[@Name='METADATA']/hdf5:Group[@Name='COLLECTIONMETADATA']/hdf5:Group[@Name='DisciplineTopicParameters']/hdf5:Group/hdf5:Group[@Name='ECSParameter']/hdf5:Attribute[@Name='ECSParameterKeyword']/hdf5:Data/hdf5:DataFromFile ISO (1) /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords[normalize-space(gmd:type/gmd:MD_KeywordTypeCode)='theme']/gmd:keyword/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[normalize-space(mri:type/mri:MD_KeywordTypeCode)='theme']/mri:keyword/gco:CharacterString UMM (1) /umm:UMM/umm:ScienceKeywords/umm:Category UMM (1) /umm:UMM/umm:ScienceKeywords/umm:Topic UMM (1) /umm:UMM/umm:ScienceKeywords/umm:Term UMM (1) /umm:UMM/umm:ScienceKeywords/umm:VariableLevel1/umm:Value UMM (1) /umm:UMM/umm:ScienceKeywords/umm:VariableLevel1/umm:VariableLevel2/umm:Value UMM (1) /umm:UMM/umm:ScienceKeywords/umm:VariableLevel1/umm:VariableLevel2/umm:VariableLevel3/umm:Value UMM (1) /umm:UMM/umm:ScienceKeywords/umm:DetailedVariable OGC-SOS (1) /sos:Capabilities/ows:ServiceIdentification/ows:Keywords[ows:Type='theme']/ows:Keyword SERF /serf:SERF/serf:Keyword THREDDS (1) //thredds:metadata/thredds:keyword THREDDS (1) //thredds:dataset/thredds:keyword netCDF (1) /nc:netcdf/nc:attribute[@nc:name=keywords]/@nc:value
Platform Keyword	Keywords that describe the platform used to collect the resource.	ECHO //echo:Platforms/echo:Platform/echo:ShortName ECHO //echo:Platforms/echo:Platform/echo:LongName ECS /*/ecs:Platform/ecs:PlatformShortName ECS /*/ecs:Platform/ecs:PlatformLongName ISO /*/gmd:identificationInfo/*/gmd:descriptiveKeywords/gmd:MD_Keywords[normalize-space(gmd:type/gmd:MD_KeywordTypeCode)='platform']/gmd:keyword/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:descriptiveKeywords/mri:MD_Keywords[normalize-space(mri:type/mri:MD_KeywordTypeCode)='platform']/mri:keyword/gco:CharacterString OGC-SOS /sos:Capabilities/ows:ServiceIdentification/ows:Keywords[ows:Type='platform']/ows:Keyword SERF /serf:SERF/serf:Source_Name/serf:Short_Name SERF /serf:SERF/serf:Source_Name/serf:Long_Name
Instrument Type	The type of instrument.	ECHO (1) /echo:Collection/echo:Platforms/echo:Platform/echo:Instruments/echo:Instrument/echo:Type ISO /gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/gmi:instrument/*/gmi:type/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:acquisitionInformation/mac:MI_AcquisitionInformation/mac:instrument/*/mac:type/gco:CharacterString UMM (1) /umm:UMM/umm:Instrument/umm:Type
Sensor Characteristics	Referential information for the collection source/sensor configuration.	ECHO /*/echo:Platforms/echo:Platform/echo:Instruments/echo:Instrument/echo:Sensors/echo:Sensor/echo:Characteristics ECS /*/ecs:Sensor/ecs:Characteristics ISO /gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/gmi:platform/eos:EOS_Platform/eos:otherProperty/gco:Record/eos:AdditionalAttributes/eos:AdditionalAttribute ISO-1 /mai:MI_Metadata/mai:acquisitionInformation/mac:MI_AcquisitionInformation/eos:sensor/eos:EOS_Sensor/eos:otherProperty/gco:Record/eos:AdditionalAttributes/eos:AdditionalAttribute
Related Resource Identifier	Identifier for a resource related to the resource being described.	ECHO (1) /*/echo:ShortName ECHO (1) /*/echo:Spatial/echo:HorizontalSpatialDomain/echo:ZoneIdentifier ECHO (1) /*/echo:ProcessingLevelId ECHO (1) /*/echo:Campaigns/echo:Campaign/echo:ShortName | /*/echo:Campaigns/echo:Campaign/echo:LongName ECHO (1) /*/echo:Platforms/echo:Platform/echo:ShortName | /*/echo:Platforms/echo:Platform/echo:LongName ECHO (1) /*/echo:Platforms/echo:Platform/echo:Instruments/echo:Instrument/echo:ShortName | /echo:*/echo:Platforms/echo:Platform/echo:Instruments/echo:Instrument/echo:LongName ECHO (1) /*/echo:Platforms/echo:Platform/echo:Instruments/echo:Instrument/echo:Sensors/echo:Sensor/echo:ShortName | /*/echo:Platforms/echo:Platform/echo:Instruments/echo:Instrument/echo:Sensors/echo:Sensor/echo:LongName ECHO (1) /*/echo:AssociatedDIFs/echo:DIF/echo:EntryId ISO (1) /*/gmd:identificationInfo/*/gmd:aggregationInfo/gmd:MD_AggregateInformation/gmd:aggregateDataSetIdentifier/gmd:MD_Identifier/gmd:code/gco:CharacterString ISO (1) /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicDescription/gmd:geographicIdentifier/gmd:MD_Identifier/gmd:code/gco:CharacterString ISO (1) /*/gmd:identificationInfo/*/gmd:processingLevel/gmd:MD_Identifier/gmd:code/gco:CharacterString ISO (1) /*/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:report/gmd:DQ_AccuracyOfATimeMeasurement/gmd:measureIdentification/gmd:MD_Identifier/gmd:code/gco:CharacterString ISO (1) /gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/gmi:operation/gmi:MI_Operation/gmi:identifier/gmd:MD_Identifier/gmd:code/gco:CharacterString ISO (1) /gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/gmi:platform/*/gmi:identifier/gmd:MD_Identifier/gmd:code/gco:CharacterString ISO (1) /gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/gmi:instrument/*/gmi:identifier/gmd:MD_Identifier/gmd:code/gco:CharacterString ISO /gmi:MI_Metadata/gmi:acquisitionInformation/gmi:MI_AcquisitionInformation/eos:sensor/eos:EOS_Sensor/eos:identifier/gmd:MD_Identifier/gmd:code/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:associatedResource/mri:MD_AssociatedResource/mri:name/cit:CI_Citation/cit:identifier/mcc:MD_Identifier/mcc:code/gco:CharacterString
TwoDCoordinateSystem	Bounding extent defined in two dimensions with min and max values.	ECHO /*/echo:TwoDCoordinateSystems/echo:TwoDCoordinateSystem ISO /*/gmd:identificationInfo/*/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicDescription/gmd:geographicIdentifier ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:extent/gex:EX_Extent/gex:geographicElement/gex:EX_GeographicDescription/gex:geographicIdentifier
Data Link	A link to data produced by the project.	ADIwg /adwig:project/adwig:idinfo/adwig:publication/adwig:citeinfo/adwig:onlink[adwig:linktype='data'] DIF /dif:DIF/dif:Related_URL ECHO /echo:Collection/echo:OnlineAccessURLs/echo:OnlineAccessURL FGDC /fgdc:metadata/fgdc:distinfo/fgdc:stdorder/fgdc:digform/fgdc:digtopt/fgdc:onlinopt/fgdc:computer/fgdc:networka/fgdc:networkr ISO /*/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributorTransferOptions/gmd:MD_DigitalTransferOptions/gmd:onLine/gmd:CI_OnlineResource[normalize-space(gmd:function/gmd:CI_OnLineFunctionCode)='download'] ISO /*/gmd:distributionInfo/gmd:MD_Distribution/gmd:transferOptions/gmd:MD_DigitalTransferOptions/gmd:onLine/gmd:CI_OnlineResource[normalize-space(gmd:function/gmd:CI_OnLineFunctionCode)='download'] ISO-1 /mdb:MD_Metadata/mdb:distributionInfo/mrd:MD_Distribution/mrd:distributor/mrd:MD_Distributor/mrd:distributorTransferOptions/mrd:MD_DigitalTransferOptions/mrd:onLine/cit:CI_OnlineResource[normalize-space(cit:function/cit:CI_OnLineFunctionCode)='download'] ISO-1 /mdb:MD_Metadata/mdb:distributionInfo/mrd:MD_Distribution/mrd:transferOptions/mrd:MD_DigitalTransferOptions/mrd:onLine/cit:CI_OnlineResource[normalize-space(cit:function/cit:CI_OnLineFunctionCode)='download']
Resource on-line Link	Online link referencing additional information about the resource.	DIF /dif:DIF/dif:Related_URL/URL DCAT /dct:accessURL ECHO /*/echo:OnlineAccessURLs/echo:OnlineAccessURL/echo:URL ECHO /*/echo:OnlineResources/echo:OnlineResource/echo:URL EML /eml:eml/eml:dataset/eml:distribution/eml:online/eml:url FGDC /fgdc:metadata/fgdc:idinfo/fgdc:citation/fgdc:citeinfo/fgdc:onlink ISO /*/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributorTransferOptions/gmd:MD_DigitalTransferOptions/gmd:onLine/gmd:CI_OnlineResource[normalize-space(gmd:function/gmd:CI_OnLineFunctionCode)='information'] ISO /*/gmd:distributionInfo/gmd:MD_Distribution/gmd:transferOptions/gmd:MD_DigitalTransferOptions/gmd:onLine/gmd:CI_OnlineResource[normalize-space(gmd:function/gmd:CI_OnLineFunctionCode)='information'] ISO /*/gmd:MD_DataIdentification/gmd:citation/gmd:CI_Citation/gmd:citedResponsibleParty/gmd:CI_ResponsibleParty/gmd:contactInfo/gmd:CI_Contact/gmd:onlineResource/gmd:CI_OnlineResource ISO-1 /mdb:MD_Metadata/mdb:distributionInfo/mrd:MD_Distribution/mrd:distributor/mrd:MD_Distributor/mrd:distributorTransferOptions/mrd:MD_DigitalTransferOptions/mrd:onLine/cit:CI_OnlineResource[normalize-space(cit:function/cit:CI_OnLineFunctionCode)='information'] ISO-1 /mdb:MD_Metadata/mdb:distributionInfo/mrd:MD_Distribution/mrd:transferOptions/mrd:MD_DigitalTransferOptions/mrd:onLine/cit:CI_OnlineResource[normalize-space(cit:function/cit:CI_OnLineFunctionCode)='information'] ISO-1 /*/mri:MD_DataIdentification/mri:citation/cit:CI_Citation/cit:onlineResource/cit:CI_OnlineResource SERF /serf:SERF/serf:Service_Citation/serf:URL
AssociatedDIFs	Specifies the Directory Interchange Format (DIF) identifier for the collection.	ECHO /*/echo:AssociatedDIFs ISO /*/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:aggregationInfo/gmd:MD_AggregateInformation/gmd:aggregateDataSetIdentifier/gmd:MD_Identifier/gmd:code ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/mri:MD_DataIdentification/mri:associatedResource/mri:MD_AssociatedResource/mri:name/cit:CI_Citation/cit:identifier/mcc:MD_Identifier/mcc:code/gco:CharacterString
Spatial Extent	The spatial extent of the resource.	ECHO /*/Spatial/HorizontalSpatialDomain/Geometry EML /eml:eml/eml:dataset/eml:coverage/eml:geographicCoverage FGDC /fgdc:metadata/fgdc:idinfo/fgdc:spdom/fgdc:bounding ISO /*/mri:MD_DataIdentification/mri:extent/gex:EX_Extent/gex:geographicElement/gex:EX_GeographicBoundingBox ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/mri:MD_DataIdentification/mri:extent/gex:EX_Extent/gex:geographicElement/gex:EX_GeographicBoundingBox
Distribution Contact	Contact information for the organization or individual that distributes the resource.	DIF /dif:DIF/dif:Data_Center/dif:Personnel/dif:Role DCAT /dct:contactPoint ECHO /*/echo:ArchiveCenter ECHO /*/Contacts/Contact[contains(Role,'Data Manager')] ECHO /*/Contacts/Contact[contains(Role,'DATA CENTER CONTACT')] ECHO /*/Contacts/Contact[contains(Role,'Archive')] ECHO /*/Contacts/Contact[contains(Role,'Distributor')] ECHO /*/Contacts/Contact[contains(Role,'GHRC USER SERVICES')] ECHO /*/Contacts/Contact[contains(Role,'User Services')] ECS /*/ecs:ArchiveCenter FGDC /fgdc:metadata/fgdc:distinfo/fgdc:distrib/fgdc:cntinfo ISO /*/gmd:distributionInfo/gmd:MD_Distribution/gmd:distributor/gmd:MD_Distributor/gmd:distributorContact/gmd:CI_ResponsibleParty ISO-1 /mdb:MD_Metadata/mdb:distributionInfo/mrd:MD_Distribution/mrd:distributor/mrd:MD_Distributor/mrd:distributorContact/cit:CI_Responsibility SERF /serf:SERF/serf:Service_Provider
Additional Attributes	Attributes used to describe unique characteristics of the collection which extend beyond those defined in the model.	ECHO /*/echo:AdditionalAttributes/echo:AdditionalAttribute ECS /*/ecs:AdditionalAttributes/ecs:AdditionalAttribute ISO //eos:AdditionalAttributes/eos:AdditionalAttribute ISO-1 //eos:AdditionalAttributes/eos:AdditionalAttribute
Browse File Name	Name of the file holding the browse graphic.	DIF /dif:DIF/dif:Multimedia_Sample/dif:File ECHO /*/echo:AssociatedBrowseImages/echo:ProviderBrowseId FGDC /fgdc:metadata/fgdc:idinfo/fgdc:browse/fgdc:browsen ISO /*/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:graphicOverview/gmd:MD_BrowseGraphic/gmd:fileName/gco:CharacterString ISO-1 /mdb:MD_Metadata/mdb:identificationInfo/*/mri:graphicOverview/mcc:MD_BrowseGraphic/mcc:fileName/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.

Data Discoverability