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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Stem dictionary

The stem dictionary, [ir_languagefiles_path]language.STM, contains the stem, which is the part of a term used in the IR indices. IR Expert considers each word to have a stem (defined in the .STM file) and many possible suffixes (defined in the .SUF file). For example: For the words go and going, “go” is the stem and “ing” is the suffix. Entries in the .STM file consist of the stem word (go) followed by a blank, and then an index entry in the suffix file (.SUF) would be “go 1“. This index indicates which suffix values are acceptable for the stem word.

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