End of support notice: On October 7th, 2026, AWS will discontinue support for AWS IoT Greengrass Version 1. After October 7th, 2026, you will no longer be able to access the AWS IoT Greengrass V1 resources. For more information, please visit [Migrate from AWS IoT Greengrass Version 1](https://docs.aws.amazon.com/greengrass/v2/developerguide/migrate-from-v1.html).

# CreateCoreDefinitionRequestBody


```
{
"Name": "string",
"InitialVersion": {
  "Cores": [
    {
      "Id": "string",
      "ThingArn": "string",
      "CertificateArn": "string",
      "SyncShadow": true
    }
  ]
},
"tags": {
  "additionalProperty0": "string",
  "additionalProperty1": "string",
  "additionalProperty2": "string"
}
}
```

CreateCoreDefinitionRequestBody  
Information required to create a core definition.  
in: body  
required: true  


properties  
Name: The name of the core definition. Type: string  
InitialVersion: Information about the initial version of the core definition. Type: CoreDefinitionVersion  
tags: The tags to attach to the new resource. Type: tags