# DataType


An object that specifies the data type of a property.

## Contents


 ** type **   <a name="tm-Type-DataType-type"></a>
The underlying type of the data type.  
Type: String  
Valid Values: `RELATIONSHIP | STRING | LONG | BOOLEAN | INTEGER | DOUBLE | LIST | MAP`   
Required: Yes

 ** allowedValues **   <a name="tm-Type-DataType-allowedValues"></a>
The allowed values for this data type.  
Type: Array of [DataValue](API_DataValue.md) objects  
Array Members: Minimum number of 0 items. Maximum number of 50 items.  
Required: No

 ** nestedType **   <a name="tm-Type-DataType-nestedType"></a>
The nested type in the data type.  
Type: [DataType](#API_DataType) object  
Required: No

 ** relationship **   <a name="tm-Type-DataType-relationship"></a>
A relationship that associates a component with another component.  
Type: [Relationship](API_Relationship.md) object  
Required: No

 ** unitOfMeasure **   <a name="tm-Type-DataType-unitOfMeasure"></a>
The unit of measure used in this data type.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Pattern: `.*`   
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/iottwinmaker-2021-11-29/DataType) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iottwinmaker-2021-11-29/DataType) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iottwinmaker-2021-11-29/DataType)