[Zope-CMF] Re: CMFUid isn't generating real uids
Jean-Marc Orliaguet
jmo at ita.chalmers.se
Sun Aug 15 17:26:47 EDT 2004
Lennart Regebro wrote:
> It may be worth noting the difference between a unique ID and a
> universally unique ID. These typically are very different with very
> different goals and applications.
>
Hi!
I think that the confusion comes from the fact being "unique" is not a
property that something has intrinsically (as for an object being "red",
"blue", ...) even though the expression 'X is unique ' is a one-place
predicate. - but in fact it always has to be taken in relation to a
policy that needs to be enforced throughout. In the context of a "unique
ID" the policy can be enforced inside a same folder, in the case of a
universally unique ID the policy must be enforced inside the context
that the term "universal" refers too - So "uniqueness" is more of the
nature of laws, regulations, concepts, habits (...) than of the nature
of a quality, and this is why the best UID generator is the one that can
best enforce a given policy.
Regards /JM
More information about the Zope-CMF
mailing list