# LookupAttribute


Specifies an attribute and value that filter the events returned.

## Contents


 ** AttributeKey **   <a name="awscloudtrail-Type-LookupAttribute-AttributeKey"></a>
Specifies an attribute on which to filter the events returned.  
Type: String  
Valid Values: `EventId | EventName | ReadOnly | Username | ResourceType | ResourceName | EventSource | AccessKeyId`   
Required: Yes

 ** AttributeValue **   <a name="awscloudtrail-Type-LookupAttribute-AttributeValue"></a>
Specifies a value for the specified `AttributeKey`.  
The maximum length for the `AttributeValue` is 2000 characters. The following characters ('`_`', '` `', '`,`', '`\\n`') count as two characters towards the 2000 character limit.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 2000.  
Required: Yes

## See Also


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/cloudtrail-2013-11-01/LookupAttribute) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/cloudtrail-2013-11-01/LookupAttribute) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/cloudtrail-2013-11-01/LookupAttribute)