Documenting Identifiers

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The importance of unique identifiers for data is well understood in terms of data citation and unambiguous attribution. As metadata are shared between National and International repositories it is becoming increasing important to be able to unambiguously identify and refer to specific records. This requirement is facilitated by including an identifier for metadata and data in the metadata. Some mechanism must exist for ensuring that these identifiers are unique. This is accomplished by specifying the naming authority or namespace for the identifier. It is the responsibility of the manager of the namespace to ensure that the identifiers in that namespace are unique.

Crosswalks

Concept Description Paths
Metadata Identifier A unique reference to the record within the catalogue (Metadata Identifier) DIF /dif:Entry_Id
ISO /*/gmd:fileIdentifier/gco:CharacterString
Resource Identifier Identifier for the cited resource DIF /dif:DIF/dif:Data_Set_Citation/dif:Dataset_DOI
DIF /dif:DIF/dif:Reference/dif:DOI
ECHO /echo:Collection/echo:DataSetId
ISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:code/gco:CharacterString
THREDDS /catalog/dataset/@ID
netCDF /nc:netcdf/nc:attribute[@name=id]
Naming Authority The organization responsible for the maintenance of the identifier (namespace) ISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:authority
ISO /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:codeSpace (19115-1)
THREDDS /catalog/dataset/@ID
netCDF /nc:netcdf/nc:attribute[@name=naming_authority]
Parent Identifier A unique identifier for a parent dataset or collection ISO /*/gmd:parentIdentifier/gco:CharacterString