| 摘要 |
<p>An information retrieval system finds information in a (DIS) Distributed Information System, {the Internet} using query learning and meta search (figure 2) for adding documents to resource directories contained in the DIS. A selection means (figure 4; yes/no link) generates training data characterized as positive and negative examples of a particular class of data residing in the DIS. A learning means (figure 4; learn link) generates from the training data at least one query that can be submitted to any one of a plurality of search engines for searching the DIS to find 'new' items of the particular class. An evaluation means (figure 4; review previous link) determines and verifies that the new item(s) is a new subset of the particular class and adds or updates the particular class in the resource directory.</p> |
