Search engines use thematic search as the basic – that is issue the links based on the words entering request. This option, at all its convenience, has no "intelligence" - that is the search engine does not understand that the user specifically looks for, search is carried out mechanically by coincidence of words. The semantic search capable can change a situation it is qualitative to improve search delivery.
Instruction
1. Modern thematic search well copes with a situation when the user knows for sure that he looks for and makes the correct search query. Nevertheless is always present at search delivery many excess links at best having indirect relation to a search subject.
2. An alternative to classical search can become semantic which algorithm is constructed so that the words sense in search query is considered. In this case the user obtains not only information on the websites on which the mention of these words, but also the specific information corresponding to an essence of search query met.
3. For example, if is will enter request for observation of the Moon, then the user will obtain information on the history of study and observation of the Moon, on technology of observation, the necessary equipment. In the fullest option the location of the user (to the IP address) can be considered therefore up-to-date information about the most convenient time of day for carrying out observations of the Moon in the area of the user will be issued.
4. Thus, when using semantic search the system itself collects and issues to the user information necessary to it, but does not send it to a set of the found resources. At the same time links will not disappear anywhere, the user will always have an opportunity to view them.
5. Many search services tried and try to implement semantic search. So, the Powerset company provided a convenient way of search in one of the most popular network sources of information - in Wikipedia. Nevertheless this solution is far from perfect as in many cases information from Wikipedia is not the best. The search service of the Hakia company collecting information on all Internet is more perfect.
6. The version of semantic search was presented by the Google company, having started Knowledge Graph service. At entering the query in a search string Google correlates it to the database which contains about half a billion objects. As a result the user receives the search result which is already containing the main part of necessary information in the right block. At the moment service is available only in English.