# ConditionBasedCollectionScheme
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Information about a collection scheme that uses a simple logical expression to recognize what data to collect.

## Contents
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 ** expression **   <a name="iotfleetwise-Type-ConditionBasedCollectionScheme-expression"></a>
The logical expression used to recognize what data to collect. For example, `$variable.`Vehicle.OutsideAirTemperature` >= 105.0`.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 2048.  
Required: Yes

 ** conditionLanguageVersion **   <a name="iotfleetwise-Type-ConditionBasedCollectionScheme-conditionLanguageVersion"></a>
Specifies the version of the conditional expression language.  
Type: Integer  
Valid Range: Fixed value of 1.  
Required: No

 ** minimumTriggerIntervalMs **   <a name="iotfleetwise-Type-ConditionBasedCollectionScheme-minimumTriggerIntervalMs"></a>
The minimum duration of time between two triggering events to collect data, in milliseconds.  
If a signal changes often, you might want to collect data at a slower rate.
Type: Long  
Valid Range: Minimum value of 0. Maximum value of 4294967295.  
Required: No

 ** triggerMode **   <a name="iotfleetwise-Type-ConditionBasedCollectionScheme-triggerMode"></a>
Whether to collect data for all triggering events (`ALWAYS`). Specify (`RISING_EDGE`), or specify only when the condition first evaluates to false. For example, triggering on "AirbagDeployed"; Users aren't interested on triggering when the airbag is already exploded; they only care about the change from not deployed => deployed.  
Type: String  
Valid Values: `ALWAYS | RISING_EDGE`   
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/iotfleetwise-2021-06-17/ConditionBasedCollectionScheme) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iotfleetwise-2021-06-17/ConditionBasedCollectionScheme) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iotfleetwise-2021-06-17/ConditionBasedCollectionScheme)