Russell,
It came up when looking at possible ways of "tagging" content to be
able to
find it. Strikes me as a somewhat wacky idea, but figured I'd pursue
it.
I basically need an alternative way to manage what could be called
"keywords" associated with a particular object. In the case I'm
working on,
an exact combination of keywords is being used to uniquely and
precisely
identify particular pieces of content.
Built-in metadata doesn't seem to be able to do that.
This lead to the idea of storing keywords as objects and when they are
assigned to an object combining the values of the keyword UUIDs so the
search to find content associated with that exact set of keywords
would only
have to search for one value.
I'm going to approach this a different way due to some need for
flexibility,
but wanted to at least follow this idea down.
David
-----Original Message-----
From: Russell Brown [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, July 18, 2001 12:50 PM
To: Spectra-Talk
Subject: RE: somewhat OT UUID question
Why do you want to combine uuid ?
Russell Brown
Internet Application Developer
Freeserve.com Plc, PO Box 452, Leeds LS2 7EY
Telephone: 0113 207 1203
-----Original Message-----
From: David Aden [mailto:[EMAIL PROTECTED]]
Sent: 18 July 2001 17:16
To: Spectra-Talk
Subject: somewhat OT UUID question
Somewhat Off-Topic (OT), slighly wacky questions...
Does anyone know the general algorithm used to produced UUID's?
I know that if you create a bunch of objects right after one another,
the
UUID usually changes in only one place. However, if you make objects
on
different days, there is a wider divergence.
Anyone have an idea of the algorithm used?
I guess a related question is whether there is anyway to force UUIDs
to
diverge by more than one character if created within a relatively
short time
span.
Where I'm going with this is I have a situation in which I might want
to
"add" UUIDs together and need to have a reasonably good assurance
that the
result will be unique, i.e. that it is quite unlikely that some other
combination of UUIDs in the database, when added together, equals the
same
result.
So, I guess an alternative question would be whether there is a
relatively
fast algorithm for combining UUIDs in such a way that the result has
a high
likelihood of being unique to that specific combination of UUIDs. I'm
looking to combine anywhere from two to 10 UUIDs.
David
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