Probably, many people know that the most famous and most authoritative
DMOZ.org catalog in the world (also
known as ODP or the Open Directory Project) puts its entire database in open access in RDF format (http://www.dmoz.org/help/ getdata.html) so that people can freely use this data on their sites. For example, this is useful for creators of niche directories, so they can fill their sites with initial information.
However, people are very often soared with the RDF format (this is a resource description format similar to XML -
xmlhack.ru/texts/06/rdf-quickintro/rdf-quickintro.html ), writes different parsers for different DBMS in different languages. And it turns out that there are people who have solved this problem for everyone. Welcome: on the page
www.we-globe.net/WebLab/Download/DmozRdf2MySQL.html there are ready MySQL dumps of the DMOZ database for the last 3 months.
There are two more interesting sections on this resource:
www.we-globe.net/WebLab/Dmoz/TotalStatistics.html - global DMOZ statistics, including data for rubrics, editors, etc. (data from 2008-06-07)
www.we-globe.net/WebLab/Hostnames.html - global statistics on hosts and domains (data from 2008-05-15)
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Everything looks, however, rather clumsy, but the information is very valuable.