# Expression


A tagged union to specify expression for a routing step.

## Contents


 ** AndExpression **   <a name="connect-Type-Expression-AndExpression"></a>
List of routing expressions which will be AND-ed together.  
Type: Array of [Expression](#API_Expression) objects  
Required: No

 ** AttributeCondition **   <a name="connect-Type-Expression-AttributeCondition"></a>
An object to specify the predefined attribute condition.  
Type: [AttributeCondition](API_AttributeCondition.md) object  
Required: No

 ** NotAttributeCondition **   <a name="connect-Type-Expression-NotAttributeCondition"></a>
An object to specify the predefined attribute condition.  
Type: [AttributeCondition](API_AttributeCondition.md) object  
Required: No

 ** OrExpression **   <a name="connect-Type-Expression-OrExpression"></a>
List of routing expressions which will be OR-ed together.  
Type: Array of [Expression](#API_Expression) objects  
Required: No

## 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/connect-2017-08-08/Expression) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/connect-2017-08-08/Expression) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/connect-2017-08-08/Expression)