In order to see if a phrase is in a file, you need to record the position in each file of a particular word. For example:

foo: index.html,5;index.html,18
bar: index.html,6;page1.html,1
baz: index.html,7

foo is the fifth and eighteenth word in index.html, bar is the sixth word in index.html and the first in page1.html, and baz is the seventh word in index.html. As you can see, the phrase "foo bar baz" is in index.html. You could probably speed things up a bit by also storing the next word in the data (foo: index.html,5,bar;index.html,18,quux) so that you don't need to perform a lookup on bar for each occurance of foo.

In reply to Re: Search Engine Theory by nardo
in thread Search Engine Theory by httptech

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