Google Refine is a power tool for working with messy data, cleaning it up, transforming it from one format into another, extending it with web services, and linking it to databases like Freebase<http://www.freebase.com/> : http://code.google.com/p/google-refine/
Não sei se vocês conhecem, achei muito bacana; aliás, o primeiro exemplo fala justamente de OpenData :) ABS()
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