# PropagatingAttribute
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An object that represents the connection attribute, thing attribute, and the user property key.

## Contents
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 ** connectionAttribute **   <a name="iot-Type-PropagatingAttribute-connectionAttribute"></a>
The attribute associated with the connection between a device and AWS IoT Core.  
Type: String  
Length Constraints: Maximum length of 128.  
Pattern: `[a-zA-Z0-9:.]+`   
Required: No

 ** thingAttribute **   <a name="iot-Type-PropagatingAttribute-thingAttribute"></a>
The user-defined thing attribute that is propagating for MQTT 5 message enrichment.  
Type: String  
Length Constraints: Maximum length of 128.  
Pattern: `[a-zA-Z0-9_.,@/:#-]+`   
Required: No

 ** userPropertyKey **   <a name="iot-Type-PropagatingAttribute-userPropertyKey"></a>
The key of the user property key-value pair.  
Type: String  
Length Constraints: Maximum length of 128.  
Pattern: `[a-zA-Z0-9:$.]+`   
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/iot-2015-05-28/PropagatingAttribute) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iot-2015-05-28/PropagatingAttribute) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iot-2015-05-28/PropagatingAttribute)