Boolean operator

The advanced search interface allows you to use Boolean operators (AND, OR, NOT, NEAR) in the query string to obtain more precise results.

The syntax of the language is simple, and is composed of only a few keywords and the standard Boolean operators.

It ignores all punctuation marks that are not used as Boolean operators and all common( noise) words that are unlikely to improve results .

You can combine such expressions with boolean operators (AND, OR, NOT).

Are the comparison and Boolean operators correct?

or you can create a complex expression, using Boolean operators, to check data for several conditions.

You can change the default behaviour by adding Boolean operators between search terms.

Note that multiple conditions are combined by using Boolean operators.

Basic Search allows you to use and - but you can not use boolean operators or more complex expressions.

An expression is defined as a series of one or more query terms joined by the boolean operators and or or.

Listing 1 shows the process of doing searches with Boolean operators.

Now look at how to implement a query with Boolean operators using Lucene's API.

The Boolean operators intitle and inurl work in Google directory, as does OR.

Standard boolean operators are available, such as and, or, xor and not.

The Boolean operators recognized in an advanced query string are as follows