# ReferenceInput
<a name="API_ReferenceInput"></a>

Reference information linking a task to external systems - for input with validation

## Contents
<a name="API_ReferenceInput_Contents"></a>

 ** associationId **   <a name="devopsagent-Type-ReferenceInput-associationId"></a>
Association identifier of the external system  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Pattern: `[a-zA-Z0-9_.-]+`   
Required: Yes

 ** referenceId **   <a name="devopsagent-Type-ReferenceInput-referenceId"></a>
The unique identifier in the external system  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Pattern: `[a-zA-Z0-9_.-]+`   
Required: Yes

 ** referenceUrl **   <a name="devopsagent-Type-ReferenceInput-referenceUrl"></a>
URL to access the reference in the external system  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 2048.  
Required: Yes

 ** system **   <a name="devopsagent-Type-ReferenceInput-system"></a>
The name of the external system  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Required: Yes

 ** title **   <a name="devopsagent-Type-ReferenceInput-title"></a>
Optional title for the reference  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 512.  
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\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/devops-agent-2026-01-01/ReferenceInput) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/devops-agent-2026-01-01/ReferenceInput) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/devops-agent-2026-01-01/ReferenceInput)