Date: Thu, 18 Dec 1997 00:30:11 GMT Server: Stronghold/1.3.3-dev Ben-SSL/1.3 Apache/1.1.1 UKWeb/1.0 Content-type: text/html Content-length: 5571 Last-modified: Wed, 02 Apr 1997 00:20:37 GMT
You can do a boolean search with some operand "AND OR NOT" and ( ) brackets.ex1) financial result ex2) digital and video ex3) CD-R not CD-ROM
score c of a file in (keyA AND keyB): c = a * b score c of a file in (keyA OR keyB): c = a + b score c of a file in (keyA NOT keyB): c = a