oops - this is the post I really wanted to refer to:

http://library-matters.blogspot.com/2009/03/summary-of-discussion-about-item-types.html

On Tue, Jan 25, 2011 at 11:42 AM, Joann Ransom <jransom@library.org.nz> wrote:
Hi Rachel,

We have gone the other way: many item types and few collections. This is a post I wrote at the time when I was trying to decide how best to use item types and colelction codes. 

http://library-matters.blogspot.com/2009/03/dont-be-afraid-of-using-lots-of-item.html

Cheers Jo.


On Tue, Jan 25, 2011 at 8:48 AM, Owen Leonard <oleonard@myacpl.org> wrote:
> The OPAC currently lists item
> type only so we assume we should actually use this to identify different
> collections.

The most important factor to consider is that at the moment item types
can be used to set circulation policies and collection codes cannot.
Other than that they're fairly interchangeable. You can set the
"AdvancedSearchTypes" system preference to show either item types or
collection code on the advanced search page.

Because circulation policies can be set per item type we have set up a
few general item types for circ rules: circulating, videos and DVDs,
audio books, and non-circulating. Then we have a lot of collection
codes which we use to classify various combinations of audience,
material, and genre.

As log as you're giving your patrons and staff the right categories to
narrow their searches and you've got the circulation policies in place
that you need, there's not a wrong way to do it.

 -- Owen

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Joann Ransom RLIANZA
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Horowhenua Library Trust.

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--
Joann Ransom RLIANZA
Head of Libraries,
Horowhenua Library Trust.

Q: Why is this email three sentences or less?
A: http://three.sentenc.es