# Parameter


Specifies a parameter.

## Contents


 ** AllowedValues **   
Specifies the valid range of values for the parameter.  
Type: String  
Required: No

 ** ApplyMethod **   
Indicates when to apply parameter updates.  
Type: String  
Valid Values: `immediate | pending-reboot`   
Required: No

 ** ApplyType **   
Specifies the engine specific parameters type.  
Type: String  
Required: No

 ** DataType **   
Specifies the valid data type for the parameter.  
Type: String  
Required: No

 ** Description **   
Provides a description of the parameter.  
Type: String  
Required: No

 ** IsModifiable **   
 Indicates whether (`true`) or not (`false`) the parameter can be modified. Some parameters have security or operational implications that prevent them from being changed.  
Type: Boolean  
Required: No

 ** MinimumEngineVersion **   
The earliest engine version to which the parameter can apply.  
Type: String  
Required: No

 ** ParameterName **   
Specifies the name of the parameter.  
Type: String  
Required: No

 ** ParameterValue **   
Specifies the value of the parameter.  
Type: String  
Required: No

 ** Source **   
Indicates the source of the parameter value.  
Type: String  
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/neptune-2014-10-31/Parameter) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/neptune-2014-10-31/Parameter) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/neptune-2014-10-31/Parameter)