[tdwg-tapir] search with no result
I found an unsolved problem in my pywrapper notes today regarding envelope-less operations. If I request a TAPIR GET service search operation which doesnt match any results, what should be returned?
Without an envelope this would be an empty document without even a root! Should we turn on the envelope in this case? Or return something like <NULL> or <NoMatches> defined by the protocol?
Markus
Markus,
I've been wondering about this too. My feeling is that we simply return an empty document (xml definition at top, but empty otherwise). I think defining a custom <NULL> or <NoMatches> element may be confusing because with no envelope, the message should be an instance of some schema other than TAPIR -- one that does not define <NULL> or <NoMatches>. I think the first approach (empty doc) is less likely to break clients.
-Steve
Döring, Markus wrote:
I found an unsolved problem in my pywrapper notes today regarding envelope-less operations. If I request a TAPIR GET service search operation which doesnt match any results, what should be returned?
Without an envelope this would be an empty document without even a root! Should we turn on the envelope in this case? Or return something like <NULL> or <NoMatches> defined by the protocol?
Markus
tdwg-tapir mailing list tdwg-tapir@lists.tdwg.org http://lists.tdwg.org/mailman/listinfo/tdwg-tapir_lists.tdwg.org
A blank (as in just XML declaration) sounds good to me.
Roger
Steven Perry wrote:
Markus,
I've been wondering about this too. My feeling is that we simply return an empty document (xml definition at top, but empty otherwise). I think defining a custom <NULL> or <NoMatches> element may be confusing because with no envelope, the message should be an instance of some schema other than TAPIR -- one that does not define <NULL> or <NoMatches>. I think the first approach (empty doc) is less likely to break clients.
-Steve
Döring, Markus wrote:
I found an unsolved problem in my pywrapper notes today regarding envelope-less operations. If I request a TAPIR GET service search operation which doesnt match any results, what should be returned?
Without an envelope this would be an empty document without even a root! Should we turn on the envelope in this case? Or return something like <NULL> or <NoMatches> defined by the protocol?
Markus
tdwg-tapir mailing list tdwg-tapir@lists.tdwg.org http://lists.tdwg.org/mailman/listinfo/tdwg-tapir_lists.tdwg.org
tdwg-tapir mailing list tdwg-tapir@lists.tdwg.org http://lists.tdwg.org/mailman/listinfo/tdwg-tapir_lists.tdwg.org
participants (3)
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"Döring, Markus" -
Roger Hyam -
Steven Perry