SYSTEM FOR SEARCHING, RECOMMENDING, AND EXPLORING DOCUMENTS THROUGH CONCEPTUAL ASSOCIATIONS AND INVERTED TABLE FOR STORING AND QUERYING CONCEPTUAL INDICES

摘要

A method for searching, recommending, and exploring documents through conceptual associations includes: receiving a plurality of documents; extracting concepts from each of the documents (102); calculating a degree of relation between each of the documents and concepts in a knowledge base (106); in response to receiving a query, determining one or more concepts from the query; for each of the determined concepts, retrieving a list of documents having a highest degree of relation to the concept; outputting a list responsive to the one or more retrieved lists. A method for storing and querying conceptual indices (CIs) includes: creating a conceptual inverted index (CII) (110) from the CIs, the CII includes CII entries, each of which corresponds to a concept in a concept graph, creating the CII includes populating each entry with pointers to documents selected from the CIs having likelihoods of being related to the concept that are greater than a threshold value, and the corresponding likelihoods; receiving a query that includes a concept in the concept graph; generating query results from a search that includes at least a subset of the pointers to documents; wherein each of the CIs is associated with a corresponding document and includes a CI entry for each concept in the concept graph, and each of the CI entries specifies a value indicating a likelihood that the document is related to the concept in the concept graph.