The standard relationship management API add/get/purgeRelationship does not
allow to alter or add Dublin Core fields. I'm aware that they are stored
differently internally in Fedora, but from a user point of view, this
distinction is not that obvious. How about changing the current API so the
server side, instead of raising an error on Dublin Core fields, executes the
request on the DC stream (instead of the RELS-EXT stream)?
It would also be nice if the API would accept a collection of relationships as
this could be done with better performance than individual ones (RELS-EXT has
to be changed only once) and the changes on the server side would be small.
In the context of DC there is also the additional problem of DC Terms vs DC
Elements. Just looking at the source code it should be possible to add DC Terms
relationships to a Fedora object using the API which would end up in RELS-EXT
but which might conflict with values in the DC datastream and which would not
be reflected in searches. If you know what's happening inside Fedora it's easy
to avoid, but for someone just wanting to use the API this could be very
confusing.
Carsten Friedrich
Research Team Leader
CSIRO ICT Centre
+61 (0) 2 6216 7019
www.ict.csiro.au<http://www.ict.csiro.au/>
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