MACROMEDIA COLDFUSION MX 61-DEVELOPING COLDFUSION MX, Develop Manual

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542 Chapter 25: Using Verity Search Expressions
You can use paired backquotes or backslashes to escape special characters. There is no functional
difference between the two. For example, you can query for the term: <DDA> using
\<DDA\>
or
`<DDA>`
as your search term.
Composing search expressions
The following rules apply to the composition of search expressions.
Case sensitivity
Verity searches are case-sensitive only when the search term is entered in mixed case. For example,
a search for zeus finds zeus, Zeus, or ZEUS; however, a search for Zeus finds only Zeus.
To have your application always ignore the case the user types, use the
LCase
function in the
criteria
attribute of
cfsearch
. The following code converts user input to lowercase, thereby
eliminating case-sensitivity concerns:
<cfsearch name="results"
collection="#form.collname#"
criteria="#LCase(form.criteria)#"
type="#form.type#">
Prefix and infix notation
By default, Verity uses infix notation , in which precedence is implicit in the expression; for
example, the AND operator takes precedence over the OR operator.
You can use prefix notation with any operator except an evidence operator (typically, STEM,
WILDCARD, or WORD; for a description of evidence operators, see “Evidence operators”
on page 548 ). In prefix notation, the expression explicitly specifies precedence. Rather than
repeating an operator, you can use prefix notation to list the operator once and list the search
targets in parentheses. For example, the following expressions are equivalent:
•
Moses <NEAR> Larry <NEAR> Jerome <NEAR> Daniel <NEAR> Jacob
•
<NEAR>(Moses,Larry,Jerome,Daniel,Jacob)
The following prefix notation example searches first for documents that contain Larry and
Jerome, then for documents that contain Moses:
OR (Moses, AND (Larry,Jerome))
The infix notation equivalent of this is as follows:
Moses OR (Larry AND Jerome)
Commas in expressions
If an expression includes two or more search terms within parentheses, a comma is required
between the elements (whitespace is ignored). The following example searches for documents that
contain any combination of Larry and Jerome together:
AND (Larry, Jerome)