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These requirements can become problems in that the web is visually centric with regard to presentation and information order\/layout. Finding semantic information already encoded directly into documents can help to alleviate these problems. Our approach can be loosely described as follows. For a particular cascading stylesheet (CSS), we provide an extension to an upper-level ontology which represents the interface between web documents and the programmatic transformation mechanism. This extension gives the particular characteristics of the elements appearing in that specific CSS. We can consider this extension to be an annotation of the CSS elements implicitly encoded into the web document. This means that one ontology can be used to accuratly transform every web document that references the CSS used to generate that ontology. Simply one ontology accuratly transforms an entire site using a generalized programmatic machinery able to cope with all sites using CSS. Here we describe our method, implementation, and technical evaluation.<\/jats:p>","DOI":"10.1145\/1275511.1275516","type":"journal-article","created":{"date-parts":[[2007,9,14]],"date-time":"2007-09-14T13:44:55Z","timestamp":1189777495000},"page":"10","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":19,"title":["SADIe"],"prefix":"10.1145","volume":"14","author":[{"given":"Simon","family":"Harper","sequence":"first","affiliation":[{"name":"University of Manchester, Manchester, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sean","family":"Bechhofer","sequence":"additional","affiliation":[{"name":"University of Manchester, Manchester, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2007,8]]},"reference":[{"key":"e_1_2_1_1_1","unstructured":"Altheim M. and Palmer S. B. 2002. 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