I think I agree here.
The harvesting "procedure" is really defined outside the Tapir protocol, is it not? So it is really an agreement between the harvester and the harvestees.
So what is really needed here is the standard procedure for maintaining a "harvestable" dataset and the standard procedure for harvesting that dataset. We have a general rule at Landcare, that we never delete records in our datasets - they are either deprecated in favour of another record, and so the resolution of that record would point to the new record, or the are set to a state of "deleted", but are still kept in the dataset, and can be resolved (which would indicate a state of deleted).
Kevin
"Renato De Giovanni" renato@cria.org.br 6/05/2008 7:33 a.m. >>>
Hi Markus,
I would suggest creating new concepts for incremental harvesting, either in the data standards themselves or in some new extension. In the case of TAPIR, GBIF could easily check the mapped concepts before deciding between incremental or full harvesting.
Actually it could be just one new concept such as "recordStatus" or "deletionFlag". Or perhaps you could also want to create your own definition for dateLastModified indicating which set of concepts should be considered to see if something has changed or not, but I guess this level of granularity would be difficult to be supported.
Regards, -- Renato
On 5 May 2008 at 11:24, Markus Döring wrote:
Phil, incremental harvesting is not implemented on the GBIF side as far as
I
am aware. And I dont think that will be a simple thing to implement
on
the current system. Also, even if we can detect only the changed records since the last harevesting via dateLastModified we still have
no information about deletions. We could have an arrangement saying
that you keep deleted records as empty records with just the ID and
nothing else (I vaguely remember LSIDs were supposed to work like
this
too). But that also needs to be supported on your side then, never entirely removing any record. I will have a discussion with the
others
at GBIF about that.
Markus
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