By: Paul
on: Fri 08 of Jan., 2010 03:14 UTC
(403 Reads)
These instructions are general in nature. Any specific questions should be directed towards your Doctor. This will give you an idea of what to expect and if you can not reach your regular Doctor for advice.
+ : A leading plus sign indicates that this word must be present in every object returned.
- : A leading minus sign indicates that this word must not be present in any row returned.
By default (when neither plus nor minus is specified) the word is optional, but the object that contain it will be rated higher.
< > : These two operators are used to change a word's contribution to the relevance value that is assigned to a row.
( ) : Parentheses are used to group words into subexpressions.
~ : A leading tilde acts as a negation operator, causing the word's contribution to the object relevance to be negative. It's useful for marking noise words. An object that contains such a word will be rated lower than others, but will not be excluded altogether, as it would be with the - operator.
* : An asterisk is the truncation operator. Unlike the other operators, it should be appended to the word, not prepended.
" : The phrase, that is enclosed in double quotes ", matches only objects that contain this phrase literally, as it was typed.
Information on Retina, Cataracts, Cornea, Macular, Lasik surgery & other items related to Eye Health. Ophthalmologist, Optometrist and other Doctors. Eye glass lenses, Lens implants & Contacts.