| 摘要 |
<p>A method of ordering information comprised in a corpus (6; 40) of documents (7; 39; 43) that comprise text comprises retrieving a count of the number of occurrences in the documents (7; 39; 43) of a first concept, retrieving a count of the number of occurrences in the corpus (6; 40) of documents (7; 39; 43) of at least one combination of the first concept and a second concept at a certain proximity to the first concept, estimating the probability of occurrence of each combination of concepts, and using the probability estimates to build a semantic network (15), comprising nodes (16-19), representing concepts, and links (20-22) between nodes (16-19), representing concept combinations. A method of retrieving information from such a corpus (6; 40), using the number of occurrences of a search term, comprises consulting such a semantic network (15), comprising nodes (16-19), including a node representing the search term, selecting relevant concept combinations, using the link between the search term and other concepts represented in the semantic network (15), and ordering and/or grouping concept combinations according to the links (20-22) by which they are represented. <IMAGE></p> |
