Are you talking about browsing classifiers? Eg a subjects button on the
navigation bar, which gives you a top level of basic subjects, which can
be further exanded to more specific subjects?
You can do this in greenstone, see e.g.
The subjects classifier for the humanity development library.
This can be achieved by using the Hierarchy classifier with either
hierarchical metadata (e.g. Trucks|Trucks military|Trucks military -
or using a supplementary file containing the hierarchy. (see section 2.2
of developers guide)
David W. Williams wrote:
> On a subject index term, say, "trucks", can Greenstone do a sub-term, a
> sub-sub term, and a sub-sub-sub term.
> Trucks military
> Trucks military - amphibious
> Also, does anyone know of sites that take subject indexing to such
> levels. My boss would like to see an example.
> Thanks in advance,
> Dave Williams
> Pace University Law Library
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