Hi, > Could anyone explain me what does exactly the common-terms.utf8 file? I > don't understand the real functionality of this file...
During indexing (and also during searching) the common terms are used to form n-grams to make search faster for common words like articles for example. It is an alternative to using stop words. N-grams keep the common words by appending them to the following word. This approach increases the selectivity. Cheers, Timo.