# Attribute
<a name="API_Attribute"></a>

The attributes from the JSON payload that are made available by the input. Inputs are derived from messages sent to the AWS IoT Events system using `BatchPutMessage`. Each such message contains a JSON payload. Those attributes (and their paired values) specified here are available for use in the `condition` expressions used by detectors. 

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

 ** jsonPath **   <a name="iotevents-Type-Attribute-jsonPath"></a>
An expression that specifies an attribute-value pair in a JSON structure. Use this to specify an attribute from the JSON payload that is made available by the input. Inputs are derived from messages sent to AWS IoT Events (`BatchPutMessage`). Each such message contains a JSON payload. The attribute (and its paired value) specified here are available for use in the `condition` expressions used by detectors.   
Syntax: `<field-name>.<field-name>...`   
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 128.  
Pattern: `^((`[\w\- ]+`)|([\w\-]+))(\.((`[\w- ]+`)|([\w\-]+)))*$`   
Required: Yes

## See Also
<a name="API_Attribute_SeeAlso"></a>

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/iotevents-2018-07-27/Attribute) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iotevents-2018-07-27/Attribute) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iotevents-2018-07-27/Attribute)