# OperandOne
<a name="API_connect-cases_OperandOne"></a>

Represents the left hand operand in the condition. In the Amazon Connect admin website, case rules are known as *case field conditions*. For more information about case field conditions, see [Add case field conditions to a case template](https://docs.aws.amazon.com/connect/latest/adminguide/case-field-conditions.html).

## Contents
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**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** fieldId **   <a name="connect-Type-connect-cases_OperandOne-fieldId"></a>
The field ID that this operand should take the value of.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 500.  
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/connectcases-2022-10-03/OperandOne) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/connectcases-2022-10-03/OperandOne) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/connectcases-2022-10-03/OperandOne)