US8078629B2
патент
An information retrieval system uses phrases to index, retrieve, organize and describe documents. Phrases are iden tified that predict the presence of other phrases in documents. Documents are the indexed according to their included phrases. A spam document is identified based on the number of related phrases included in a document. 36 Claims, 6 Drawing Sheets
Притязаний: 35. Знаков текста: 136 629.