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Compared to conventional navigation patterns tag clouds don’t necessarily offer a more convenient and intuitive navigation. However, used properly, they can provide visitors with an instant illustration of the main topics, giving a very specific and precise orientation of the site’s content. Since human beings tend to think in concepts and models, it’s easier to get an idea of presented content if the main concepts are given straight away — in digestible pieces, and prioritized by their weight. In fact, the main advantage of tag clouds lies in their ability to highlight the most important or/and popular subjects dynamically which is not the case in conventional navigation menus. Tag clouds offer a quite interesting approach for site navigation; although the technique is sometimes considered to be an “alternative”, it shouldn’t replace the “common” navigation but support it giving users additional clues about the content of the site.
W3C Recommendation 10 February 2004 New Version Available: OWL 2 (Document Status Update, 12 November 2009) The OWL Working Group has produced a W3C Recommendation for a new version of OWL which adds features to this 2004 version, while remaining compatible. Please see OWL 2 Document Overview for an introduction to OWL 2 and a guide to the OWL 2 document set. This version: http://www.w3.org/TR/2004/REC-owl-features-20040210/