R_NEAR
Name
R_NEAR
Synopsis
Returns records where the listed terms
or subqueries are within a specified number of words.
Arguments
Maximum distance between the words
List of terms and subqueries
Ranking Scheme
Ranks using the probabilistic method.
The returned weight for hits in a record is the probability of
all the terms with the specified weights in a given record being
found together. That is calculated by multiplying the probability
of those terms not occuring and taking the complement of this.
Comments
NEAR returns the hits (location) for each
term or subquery that are within the specified number of words
of each other.
Note that while we say, "within n
words," what counts as a word is specified by the indexing
process. Each call to prIndexWord increments the word count.
Example
R_NEAR( 3 'blue', 'green' );
See Also
near, r_near, p_near,
v_near, ordered_near,
r_ordered_near, p_ordered_near,
v_ordered_near