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)`

Service Manager9.41

Develop > Tailoring > Links > Understanding links > Specifying a link query

Specifying a link query

If you want to control the search criteria used by Find and Fill, define a specific link query.

There can be instances when the link is dependent on more than the simple value of fields in the records. For example, links from an incident document could be dependent on the device type. Link Maintenance allows specification of expressions that are evaluated by the Fill and Find operations before the link query is built.

Whenever the link relationship varies according to data in the source record, using expressions and a variable for the target file is the most efficient method for establishing a link.

Expressions process in the order they are listed on the form.

Note: Be aware that If the $query variable is used in link records, each $query value is valid only in the current thread. This means a $query value might be overwritten by executing a second link query. To avoid this issue, you can use $L.query instead of $query in these cases.

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