Visit this link In 1904–07 Otlet published the first full version of his new classification scheme. https://www.britannica.com/biography/Paul-Otlet#ref1090156
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I think UDC first published in year 1905.
In 1904–07 Otlet published the first full version of his new classification scheme. https://www.britannica.com/biography/Paul-Otlet#ref1090156