# ReferenceItem
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A genome reference.

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

 ** referenceArn **   <a name="omics-Type-ReferenceItem-referenceArn"></a>
The reference's ARN.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 127.  
Pattern: `arn:.+`   
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/omics-2022-11-28/ReferenceItem) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/omics-2022-11-28/ReferenceItem) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/omics-2022-11-28/ReferenceItem)