Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

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Develop > Programming Guide > System Language reference > List: RAD functions > RAD function: clean.display.value

RAD function: clean.display.value

A RAD function that cleans up the internal display value cache associated with a file variable.

Function

clean.display.value

Format

clean.display.value($file, [$fieldname])

Parameters

The following parameters are valid for this function.

Parameter	Description
$file	The file variable whose internal display value cache is to be cleaned up.
$fieldname	The field whose display value is to be cleaned up. If this parameter is not specified, the entire internal display value cache of $file is cleaned up.

Return values

Null or the old display value.

Examples

clean.display.value($file)

clean.display.value($file, “logical.name”)