# Behavior

The type of expansion to use for terms. You can use one of the following values:

- Trailing. Expand the text only from the end of the word or phrase that the user provides. In this case, QMS uses a trailing wildcard (`term*`) to return only expansion options that start with the value that the user types. For example, this option might expand th to theater, and not to with.

- Substring. Expand the text so that the user text forms any substring of the possible expansions. In this case, QMS uses a leading and a trailing wildcard (`*term*`) to return expansion options that contain the value as some substring of a term or phrase. For example, this might expand th to theater, with, and anthem.

Actions: | TypeAhead
Type: | String
Default: | Trailing
Example: | `Behavior=substring`
See Also: | DictionaryMaxNGram DictionaryMinNGram

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