Improvements to the OAIPMH Harvester

Date	2012-07-16
Contact(s)	Simon Pigot
Last edited	2012-07-16
Status	draft, being discussed
Assigned to release	2.9
Resources	Available
Ticket #	#XYZ

Overview

OAIPMH Harvester in GeoNetwork needs to be enhanced to support the following:

• Object harvesting: In recent times GeoNetwork has moved from supporting ISO19115/19139 metadata in the form of a 'record' to supporting a tree based hierarchy of ISO19115/19139 metadata 'objects'. The diagram below shows a typical hierarchy:

The mechanisms for handling these relationships are part of the ISO standard. They can be explicit in the form of an xlink that refers directly to the related metadata object:

Or implicit by including the UUID of a related metadata object as content in an element. Here is an example of a parent record UUID in the content of the parent identifier element:

And another example of a sibling relationship between a dataset metadata record and a project metadata record (uuid: urn:marine.csiro.au:marlin:project:187):

    <gmd:aggregateInformation>
       <gmd:MD_AggregateInformation>
            <gmd:aggregateDataSetIdentifier>
                ...
                <gmd:MD_Identifier>
                    <gmd:code>
                        <gco:CharacterString>urn:marine.csiro.au:marlin:project:187</gco:CharacterString>
                    </gmd:code>
                </gmd:MD_Identifier>
                ...
            </gmd:aggregateDataSetIdentifier>
            <gmd:associationType>
                <gmd:DS_AssociationTypeCode codeList="..." codeListValue="crossReference">crossReference</gmd:DS_AssociationTypeCode>
            </gmd:associationType>
            <gmd:initiativeType>
                <gmd:DS_InitiativeTypeCode codeList="..." codeListValue="project">project</gmd:DS_InitiativeTypeCode>
            </gmd:initiativeType>
        </gmd:MD_AggregateInformation>
    </gmd:aggregateInformation>

• Deleted Records:

Proposal Type

• Type: GUI Change, Core Change, Module Change, Guideline and project governance procedures, ...
• App: GeoNetwork or !Intermap
• Module: eg. Harvester, Kernel, Data Manager, Metadata Import, Lucene Index, Search Interface ...

Links

• Documents:
• Email discussions:
• Other wiki discussions:

Voting History

• Vote proposed by X on Y, result was +/-n (m non-voting members).