We made the Dewey Decimal Classification system summaries available for open use a while ago on the ResearchWorks website (the top three levels). I am not sure how widely noticed this was.
The Dewey Decimal Classification (DDC) system uses simple decimal notation to divide recorded knowledge into 10 main classes, 100 divisions and 1,000 sections. [OCLC ResearchWorks – About DDC and the Summaries]
What has been noticed in a couple of places are the DDC RSS feeds.
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