# PackageGroupReference
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Information about the identifiers of a package group.

## Contents
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 ** arn **   <a name="codeartifact-Type-PackageGroupReference-arn"></a>
 The ARN of the package group.   
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1011.  
Pattern: `\S+`   
Required: No

 ** pattern **   <a name="codeartifact-Type-PackageGroupReference-pattern"></a>
 The pattern of the package group. The pattern determines which packages are associated with the package group, and is also the identifier of the package group.   
Type: String  
Length Constraints: Minimum length of 2. Maximum length of 520.  
Pattern: `[^\p{C}\p{IsWhitespace}]+`   
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/codeartifact-2018-09-22/PackageGroupReference) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/codeartifact-2018-09-22/PackageGroupReference) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/codeartifact-2018-09-22/PackageGroupReference)