# PreProcessingTrace


Details about the pre-processing step, in which the agent contextualizes and categorizes user inputs.

## Contents


**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** modelInvocationInput **   <a name="bedrock-Type-agent-runtime_PreProcessingTrace-modelInvocationInput"></a>
The input for the pre-processing step.  
+ The `type` is `PRE_PROCESSING`.
+ The `text` contains the prompt.
+ The `inferenceConfiguration`, `parserMode`, and `overrideLambda` values are set in the [PromptOverrideConfiguration](https://docs.aws.amazon.com/bedrock/latest/APIReference/API_agent_PromptOverrideConfiguration.html) object that was set when the agent was created or updated.
Type: [ModelInvocationInput](API_agent-runtime_ModelInvocationInput.md) object  
Required: No

 ** modelInvocationOutput **   <a name="bedrock-Type-agent-runtime_PreProcessingTrace-modelInvocationOutput"></a>
The foundation model output from the pre-processing step.  
Type: [PreProcessingModelInvocationOutput](API_agent-runtime_PreProcessingModelInvocationOutput.md) object  
Required: No

## See Also


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/bedrock-agent-runtime-2023-07-26/PreProcessingTrace) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-agent-runtime-2023-07-26/PreProcessingTrace) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/bedrock-agent-runtime-2023-07-26/PreProcessingTrace)