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Fuzzy OSF logic is a knowledge representation and reasoning language based on feature symbols, denoting functions, and sort symbols, denoting fuzzy sets. Sort symbols are organized in a fuzzy subsumption relation that extends to OSF terms, record-like structures representing classes of entities. The unification algorithm for these structures provides a calculus of fuzzy type subsumption. We demonstrate the system\u2019s behavior on representative examples, such as computing the membership degree of an instance to a sort, and computing subsumption degrees between sorts and OSF terms. We also report a comparison with a resolution-based fuzzy logic programming system.<\/jats:p>","DOI":"10.1007\/978-3-032-32592-1_22","type":"book-chapter","created":{"date-parts":[[2026,7,23]],"date-time":"2026-07-23T10:20:30Z","timestamp":1784802030000},"page":"368-377","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Implementing Fuzzy OSF Logic Unification and\u00a0Normalization (Short Paper)"],"prefix":"10.1007","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1757-0152","authenticated-orcid":false,"given":"Gian Carlo","family":"Milanese","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6080-8170","authenticated-orcid":false,"given":"Gabriella","family":"Pasi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,7,24]]},"reference":[{"key":"22_CR1","unstructured":"A\u00eft-Kaci, H.: A lattice theoretic approach to computation based on a calculus of partially ordered type structures. 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