the present invention based on the knowledge structure for the search service providing method and apparatus for on that, The search service providing method comprising: providing a document retrieval and corresponding to the query entered by the user; Comprising the steps of: providing additional structure to generate a knowledge corresponding to the document; When one of the plurality of keywords contained in the knowledge structure selected, the additional search steps related to documents containing the keyword; Calculating a degree of similarity between the document and compare the knowledge structure of the knowledge structure of the document and the associated document; And, based on the similarity degree calculation it may include performing a like operation or document or document action.
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