Difference between revisions of "Documenting Identifiers"
(Created page with "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 Internation...") |
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<td style="word-break:break-all;">Resource Identifier</td> | <td style="word-break:break-all;">Resource Identifier</td> | ||
<td style="word-break:break-all;">Identifier for the cited resource</td> | <td style="word-break:break-all;">Identifier for the cited resource</td> | ||
| − | <td style="word-break:break-all;"><b>DIF</b> /dif:DIF/dif:Data_Set_Citation/dif:Dataset_DOI<br><b>DIF</b> /dif:DIF/dif:Reference/dif:DOI<br><b>ECHO</b> /echo:Collection/echo:DataSetId<br><b>ISO</b> /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:code/gco:CharacterString<br><b>THREDDS</b> /catalog/dataset/@ID<br><b>netCDF</b> /nc:netcdf/nc:attribute[@name=id]<br></td> | + | <td style="word-break:break-all;"><b>DIF</b> /dif:DIF/dif:Data_Set_Citation/dif:Dataset_DOI<br><b>DIF</b> /dif:DIF/dif:Reference/dif:DOI<br><b>ECHO</b> /echo:Collection/echo:DataSetId<br><b>ISO</b> /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:code/gco:CharacterString<br><b>THREDDS</b> /thredds:catalog/thredds:dataset/@ID<br><b>netCDF</b> /nc:netcdf/nc:attribute[@name=id]<br></td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
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<td style="word-break:break-all;">The organization responsible for the maintenance of the identifier (namespace)</td> | <td style="word-break:break-all;">The organization responsible for the maintenance of the identifier (namespace)</td> | ||
<td style="word-break:break-all;"><b>ISO</b> /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:authority<br><b>ISO</b> /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:codeSpace | <td style="word-break:break-all;"><b>ISO</b> /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:authority<br><b>ISO</b> /*/gmd:identificationInfo/*/gmd:citation/gmd:CI_Citation/gmd:identifier/gmd:MD_Identifier/gmd:codeSpace | ||
| − | (19115-1)<br><b>THREDDS</b> /catalog/dataset/@ID<br><b>netCDF</b> /nc:netcdf/nc:attribute[@name=naming_authority]<br></td> | + | (19115-1)<br><b>THREDDS</b> /thredds:catalog/thredds:dataset/@ID<br><b>netCDF</b> /nc:netcdf/nc:attribute[@name=naming_authority]<br></td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
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</tr> | </tr> | ||
</table> | </table> | ||
| + | ''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. | ||
[[Category:Documentation Connections]] | [[Category:Documentation Connections]] | ||
Revision as of 09:16, October 21, 2012
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 /thredds:catalog/thredds: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 /thredds:catalog/thredds: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 |
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.
