# SignalExternalWorkflowExecutionInitiatedEventAttributes
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Provides the details of the `SignalExternalWorkflowExecutionInitiated` event.

## Contents
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 ** decisionTaskCompletedEventId **   <a name="SWF-Type-SignalExternalWorkflowExecutionInitiatedEventAttributes-decisionTaskCompletedEventId"></a>
The ID of the `DecisionTaskCompleted` event corresponding to the decision task that resulted in the `SignalExternalWorkflowExecution` decision for this signal. This information can be useful for diagnosing problems by tracing back the chain of events leading up to this event.  
Type: Long  
Required: Yes

 ** signalName **   <a name="SWF-Type-SignalExternalWorkflowExecutionInitiatedEventAttributes-signalName"></a>
The name of the signal.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Required: Yes

 ** workflowId **   <a name="SWF-Type-SignalExternalWorkflowExecutionInitiatedEventAttributes-workflowId"></a>
The `workflowId` of the external workflow execution.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Required: Yes

 ** control **   <a name="SWF-Type-SignalExternalWorkflowExecutionInitiatedEventAttributes-control"></a>
Data attached to the event that can be used by the decider in subsequent decision tasks.  
Type: String  
Length Constraints: Maximum length of 32768.  
Required: No

 ** input **   <a name="SWF-Type-SignalExternalWorkflowExecutionInitiatedEventAttributes-input"></a>
The input provided to the signal.  
Type: String  
Length Constraints: Maximum length of 32768.  
Required: No

 ** runId **   <a name="SWF-Type-SignalExternalWorkflowExecutionInitiatedEventAttributes-runId"></a>
The `runId` of the external workflow execution to send the signal to.  
Type: String  
Length Constraints: Maximum length of 64.  
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/swf-2012-01-25/SignalExternalWorkflowExecutionInitiatedEventAttributes) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/swf-2012-01-25/SignalExternalWorkflowExecutionInitiatedEventAttributes) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/swf-2012-01-25/SignalExternalWorkflowExecutionInitiatedEventAttributes)