
Chapter 8: Verity Topics
Proximity operators
Proximity operators specify the relative location of specific
words in the document; that is, specified words must be in the same
phrase, paragraph, or sentence for a document to be retrieved. In
the case of the NEAR and NEAR/N operators, retrieved
documents are relevance-ranked based on the proximity of the specified
words. When proximity operators are nested, the ones with the broadest
scope should be used first; that is, phrases or individual words
can appear within SENTENCE or PARAGRAPH operators, and SENTENCE operators can appear within PARAGRAPH operators. Table 8-2 describes each proximity
operator.
Table 8-2: Proximity operators
Operator name
|
Description
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IN
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Selects documents that contain specified
values in one or more document zones. A document zone represents
a region of a document, such as the document’s summary,
date, or body text.
|
PHRASE
|
Selects documents that include a phrase
you specify. A phrase is a grouping of two or more words that occur
in a specific order.
|
SENTENCE
|
Selects documents that include all of
the words you specify within a sentence.
|
PARAGRAPH
|
Selects documents that include all of
the search elements you specify within a paragraph.
|
NEAR
|
Selects documents containing specified
search terms within close proximity to each other.
|
NEAR/N
|
Selects documents containing two or more
words within N number of words of each other, where N is an integer.
|
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