On Thu, 17 Nov 2011, Poul wrote:

My point about UUID's was that strictly speaking, you really need to
know what it is that the uuid identifies, and that's a semantic issue.

Ah, okay, somewhere along the line I thought we had already gotten
past that. I think in relation to the need for revision identifiers
to be separate from identifiers for the tiddler which "has" those
revisions.

I could imagine that a collection of tiddlers had the same value for a
named uuid, because either:

* they were different versions of the same tiddler.

This is what I was thinking. And those different versions may exist
anywhere (in a tiddlywiki file, on a server, on some other server).
In aggregate they are "the tiddler". How the resolution of all those
revisions is handled is a _different_ issue from identifying that they
are in fact the same tiddler.

on two things:
1) What the tiddler-identifying id is named (simple).
2) What it means to have identified a tiddler. Not so simple. IMHO.

Yes.

If, say, you receive a document that contains 42 more or less
different tiddlers having 17 different uuids, what can be deduced
about their relationships..?
A plausible interpretation would be 17 tiddlers, some of which have
several versions. You may of course choose not to accept such a
document. Or try to figure out which is the current version - but
don't assume that it's the one with the latest timestamp.

This is aligned with my thinking.

--
Chris Dent                                   http://burningchrome.com/
                                [...]

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