The "Xenon" program -- a reference to the super-bright auto headlights that light up dark places -- was started in The Netherlands in 2004 by the Dutch equivalent of the IRS, Belastingdienst. It has since been expanded and enhanced by international group of tax authorities in Austria, Denmark, Britain and Canada, with the assistance of Amsterdam-based data mining firm Sentient Machine Research.
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Xenon is primarily a spider: a program that downloads a web page, then traverses its links and downloads those as well, ad infinitum. In this manner spiders can create huge datasets of web material, while preserving the relationships between pages at the moment they were spidered -- something that can reveal a lot about the people that made the pages.
Read more over at Wired News











