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Here we present the kernel ideas of KL\u2010ONE, emphasizing its ability to form complex structured descriptions. In addition to detailing all of KL\u2010ONE's description\u2010forming structures, we discuss a bit of the philosophy underlying the system, highlight notions of taxonomy and classification that are central to it, and include an extended example of the use of KL\u2010ONE and its classifier in a recognition task.<\/jats:p>","DOI":"10.1207\/s15516709cog0902_1","type":"journal-article","created":{"date-parts":[[2005,7,18]],"date-time":"2005-07-18T01:05:18Z","timestamp":1121648718000},"page":"171-216","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":822,"title":["An Overview of the KL\u2010ONE Knowledge Representation System*"],"prefix":"10.1111","volume":"9","author":[{"given":"Ronald J.","family":"Brachman","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"James G.","family":"Schmolze","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2010,2,11]]},"reference":[{"key":"e_1_2_1_2_1","volume-title":"Machine Intelligence 3","author":"Amarel S.","year":"1968"},{"key":"e_1_2_1_3_1","volume-title":"Research in natural language understanding, annual report","author":"Bobrow R. 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