I use the file structure.rdf.u8.gz available at http://dmoz.org/rdf.html to mine dmoz.org for links to harvest. The text + meta info + title of these links are gathered and analyzed for word frequency. This is the first pass. It takes a looong time.

In the second pass, the key words minus stop words are connected to categories using a DB_File-tied hash. This takes a pretty long time.

The third pass is the matching. This takes between one and maybe ten seconds depending on how much of the hash files are still in disk cache. It's a pretty naive way of performing the match, ideas and suggestions are welcome :)

The XML parsing is home-grown, although there are modules for doing RDF stuff. It's not that difficult to get right anyway. The worst problems are a) spidering a million links takes time, and b) the dmoz editors keep changing the category structure all the time.

/J

In reply to Re: Re: Module namespace: OpenDirectory something? by jplindstrom
in thread Module namespace: OpenDirectory something? by jplindstrom

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