a web-centric concept formulated by Netscape.com CEO Jason Calacanis as a follow-up to Tim O'Reilly's Web 2.0 vision. Its essence is that Web 2.0 (which in turn is a rethinking of Web 1.0) implies ensuring that information on the Web is understood primarily by a person, and Web 3.0 will provide interaction and understanding of data on the Web by computer systems.

The definition was posted on Calacanis' personal blog[1] on March 10, 2007. Calacanis noted that Web 2.0 made it possible to quickly and practically free use a significant number of powerful Internet services with high consumer qualities, which led to the emergence of a huge amount of monotonous resources, and, as a result, the depreciation of most of them. The idea is that on the basis of Web 2.0, a new platform should emerge - not so much technological as socio-cultural, used by professionals to create interesting, useful and high-quality content. As an example of the trend towards the transition from Web 2.0 to Web 3.0, Calacanis cites the German section of Wikipedia, which, as content is filled, resorts to closing quality articles for editing by inexperienced participants, introduces peer review of articles by professional editors[2].

One of the interpretations of the term Web 3.0 is its correlation with the semantic web. The main idea of this concept is based on the introduction of a metalanguage that describes the content of sites for organizing automatic exchange between servers. The descriptive mechanisms of the semantic web have indeed been developed (RDF, DAML, OIL, OWL), however, a number of problems appear at the stage of processing and displaying information:

the need for additional costs to create a semantic version of each site, which makes the technology much less accessible; lack of guarantee of an adequate description by webmasters of their own resources (similarly with the history of using the "keywords" tag); the impossibility of adopting a single format for describing the properties of resources in the conditions of existing competition due to the corporate advertising policy of the creators of the resource and the presence of a wide field for manipulating descriptive mechanisms. Web 2.0 author Tim O'Reilly proposed defining Web 3.0 as "the interaction of the Internet with the physical world." He has also repeatedly criticized[3] the identification of the Semantic Web with the concept of Web 3.0.

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