conferences, tag collisions, the power of AND

The California Library Association conference is going on (November 4-7, 2005).

Logical tags would be the usual suspects: CLA2005 or CLA05.

Only problem: the Canadian Library Association conference was June 15-18, 2005.

Logical tags were: CLA2005 or CLA05.

It's going to be in Ottawa next year and I was certainly planning on tagging it CLA2006.

Hmm, problem.
In fact, when Librarian In Black wrote that she was blogging CLA, I was like err, wasn't that conference months ago?

So even in this small field of ours, the simple folksonomy may not be handling things so well.

(As a very minor aside, the toplevel domain for the entire country of Canada is .ca, which also happens to be the mid-level domain for California.  For example, California government is www.ca.gov, Canadian government is www.gc.ca  Don't ask me why they made the country codes only two letters.)

Plus which, this single tag thing is not going to scale.  Want to see all the postings for five years of conferences?  I guess you have to search ILI2005 ILI2006 ILI2007 ILI2008 ILI2009 ILI2010.  Or maybe you search ILI05 etc.  But wait, is ILI05 the 5th ILI conference, or the conference in 2005?

Can Technorati do boolean tags (it's not clear to me) and if it can, shouldn't we be tagging with two tags ILI, 2005 so we could search e.g. ILI AND 2005?

And using a conference tag registry to prevent collisions?
Hmm, if only someone had made one.
(I might move it to LibSuccess, that seems a more logical location.)