Re: proposal for subjects in subject tree

Tony Barry <> Tue, 01 December 1992 03:08 UTC

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Date: Tue, 1 Dec 1992 12:40:11 +1000
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From: Tony Barry <>
Subject: Re: proposal for subjects in subject tree
Cc: Ton Verschuren <>,,,,


>then in fact only the top level of the tree will be different,
>perhaps all the bottom trees will be in common.
>The tree will have two roots. Its only when you have to
>uniquely number the things that you force a single subject tree.

Unique numbers don't force a single subject tree. They do force a location
in that tree but each item can have more than one classification so it can
be in more than one place.

Also gopher (or WWW) lets you have what a simple subject tree does not -
cross links between branches. If you find that two subject areas on remote
arms overlap you can put a cross link to take you across. You can patch the
defects in the classification.

Regards Tony
Tony Barry. Head, Centre for Networked Access to Scholarly Information

    Australian National University Library     | fone   +61 6 249 4632
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