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Precondition add-must-be-new-label

From: Werner Donné <werner.donne@re.be>
Date: Fri, 14 Jul 2006 18:58:41 +0200
Message-ID: <44B7CD41.1010508@re.be>
To: ietf-dav-versioning@w3.org


The add-must-be-new precondition of the LABEL method makes it
impossible to move a label. Moving a label requires a remove
followed by an add, which are two round-trips. Instead of
having the precondition, the postcondition label-must-be-unique
would provide the same data integrity, while avoiding the
extra round-trip.

An additional advantage is that the move would be atomic. A
remove followed by an add is not. The impact of a failure in
between can be dramatic.


Werner Donné  --  Re
Engelbeekstraat 8
B-3300 Tienen
tel: (+32) 486 425803	e-mail: werner.donne@re.be
Received on Friday, 14 July 2006 16:58:13 UTC

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