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Coupled resource

Name Coupled resource
Definition Provides information about the dataset over which the service is established.
Obligation
  • dataset or dataset series: not applicable. 
  • service: conditional; mandatory if there is available link to the dataset for which the service is established
Multiplicity [0..*]
Example http://example.com/csw?SERVICE=CSW&VERSION=2.0.2&REQUEST=GetRecordById&ID=
f9ee6623-cf4c-11e1-9105-
0017085a97ab&OUTPUTSCHEMA=http://www.isotc211.org/2005/gmd&
ELEMENTSETNAME=full#md-so-1002001

http://example.com/csw?SERVICE=CSW&VERSION=2.0.2&REQUEST=GetRecordById&ID=
f9ee6623-cf4c-11e1-9105-
0017085a97ab&OUTPUTSCHEMA=http://www.isotc211.org/2005/gmd&
ELEMENTSETNAME=full#xpointer(//gmd:identificationInfo[1]/gmd:MD_DataIdentification)
http://geoportal.nipp.hr/hr/nipp/pp/0007
A coupled resource must be specified when documenting service metadata for a dataset or dataset series that are already registred in the Croatian NSDI metadata system. It is documented using the srv:operatesOn element by specifying a unique resource identifier (URI) in the xlink:href attribute of the gmd:MD_DataIdentification element which contains information on the identification of the dataset or dataset series for which the service is established.

Technical data
 
INSPIRE equivalent Coupled resource
Comparison with INSPIRE equivalent
ISO equivalent [9] operatesOn
Comparison with ISO equivalent, but only implementation by link is supported
XPath identificationInfo/*/operatesOn
Data type MD_DataIdentification
Domain Unique resource identifier (URI) or location (URL) MD_DataIdentification of the object. 
Implementation instructions The unique resource identifier of the gmd:MD_DataIdentification element which contains the information on the identification of a dataset or dataset series over which the service is established, can be implemented, for example, using:
  • OGC CSW requests in W3C XPointer form referring to gmd:MD_DataIdentification element
    • unique identifier of the gmd:MD_DataIdentification element (see coding example 1), if a unique identifier is given or
    • any other valid XPointer expression (see coding example 2)
  • unique resource identifiers of a dataset or dataset series that take the form of an OGC CSW request in XPointer form by a specific redirection mechanism referring to gmd:MD_DataIdentification element
 

Encoding example 1: Coupled resource URI as OGC CSW request in W3C XPointer form referring to gmd:MD_DataIdentification element with unique identifier
 
<gmd:MD_Metadata...
...
     <gmd:identificationInfo>
         <srv:SV_ServiceIdentification>
...
            <srv:operatesOn xlink:href="http://example.com/csw?SERVICE=CSW&VERSION=2.0.2&REQUEST=GetRecordById&ID=f9ee6623-cf4c-11e1-9105-0017085a97ab&OUTPUTSCHEMA=http://www.isotc211.org/2005/gmd&ELEMENTSETNAME=full#md-so-1002001"/>
...
         </srv:SV_ServiceIdentification>
     </gmd:identificationInfo>
...
</gmd:MD_Metadata>

Encoding example 2: Coupled resource URI as OGC CSW request in W3C XPointer form referring to gmd:MD_DataIdentification element XPointer expression
 
<gmd:MD_Metadata...
...
     <gmd:identificationInfo>
         <srv:SV_ServiceIdentification>
...
            <srv:operatesOn xlink:href="http://example.com/csw?SERVICE=CSW&VERSION=2.0.2&REQUEST=GetRecordById&ID=f9ee6623-cf4c-11e1-9105-0017085a97ab&OUTPUTSCHEMA=http://www.isotc211.org/2005/gmd&ELEMENTSETNAME=full# xpointer(//gmd:identificationInfo[1]/gmd:MD_DataIdentification)"/>
...
         </srv:SV_ServiceIdentification>
     </gmd:identificationInfo>
...
</gmd:MD_Metadata>

Encoding example 3: Coupled resource URI in the form of a unique resource identifier of a dataset or dataset series source
 
<gmd:MD_Metadata...
...
     <gmd:identificationInfo>
         <srv:SV_ServiceIdentification>
...
            <srv:operatesOn xlink:href="http://geoportal.nipp.hr/hr/nipp/pp/0007"/>
...
         </srv:SV_ServiceIdentification>
     </gmd:identificationInfo>
...
</gmd:MD_Metadata>