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Ontological display of the product information enables better product comparison and search applications using the semantics of the product specifications and their corresponding values. In this article, we present a framework called OPPCAT, which is used for semi-automatic ontology population from tabular data in e-commerce stores and product catalogues. As a result, OPPCAT allows tabular data to be used for mass production of ontology content. First, we present the common patterns in tabular data which obstruct semi-automatic production of ontologies. Then, we suggest solutions which automatically fix these errors. Finally, we define an algorithm to build ontology content semi-automatically.<\/jats:p>","DOI":"10.1177\/0165551519827892","type":"journal-article","created":{"date-parts":[[2019,2,21]],"date-time":"2019-02-21T10:33:24Z","timestamp":1550745204000},"page":"161-175","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["OPPCAT: Ontology population from tabular data"],"prefix":"10.1177","volume":"46","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7127-7902","authenticated-orcid":false,"given":"Ovunc","family":"Ozturk","sequence":"first","affiliation":[{"name":"Department of Computer Engineering, Manisa Celal Bayar University, Manisa, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2019,2,21]]},"reference":[{"key":"bibr1-0165551519827892","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-540-24750-0_9"},{"key":"bibr2-0165551519827892","volume-title":"Proceedings of SIGIR workshop on ecommerce","author":"Kutiyanawala A"},{"key":"bibr3-0165551519827892","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-20795-2_6"},{"key":"bibr4-0165551519827892","unstructured":"Patel C, Supekar K, Lee Y. 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