| 摘要 |
An information retrieval system uses phrases to index, retrieve, organize and describe documents. Phrases are identified that predict the presence of other phrases in documents. Documents are then indexed according to their included phrases. The document index is partitioned into multiple indexes, including a primary index and a secondary index. The primary index stores phrase posting lists with relevance rank ordered documents. The secondary index stores excess documents from the posting lists in document order. Websites Client Intemet Qey Search "* Results Front End Searc R uts~ Server Query 110 120 Search 130 indexing Search Resul-- t-- Presentation System System System Primary Index Second index Phrase Primary Secondary Servers 1-M1 Servers 1 -M2 |
