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

# CreateCoreDefinitionRequestBody
<a name="parameters-createcoredefinitionrequestbody"></a>

```
{
"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