Representing facets in the vocabulary

[Enrico Zini]

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Hello,

I'm trying to extend libdetags to use a Tag class instead of a
std::string to represent tags.  I'm also introducing a Facet class to
represent facets, and converting the vocabulary to be the central
container for Tags and Facets.

In this process, I'd like to be able to represent facets in the
vocabulary, together with a description and possibly further data in the
future.

One way to do this would be to introduce a record identified by "Facet:"
instead of "Tag:", which would hold the facet data.  Then I would
convert all the existing "Tag: <facet-name>" into "Facet: <facet-name>".

This has the potential to break parsers that rely on finding a "Tag:"
field in every record, and elimitates from the vocabulary the current
tags with the facet name like "admin" and "uitoolkit".  These latter
tags are however regenerated from tag names when loading the archive
with the library initialized with facet_only=false option.

My middle-term plan would be to get rid of implications and of
non-faceted tags in the vocabulary, having only "Facet: facet" facet
descriptions and "Tag: facet::tag" tag description.

Any comments?

Ciao,

Enrico

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GPG key: 1024D/797EBFAB 2000-12-05 Enrico Zini <enrico@debian.org>

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