= 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).