---
title: Greengrass Core Definition
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: Docs > DDSQL Reference > Data Directory > Greengrass Core Definition
---

# Greengrass Core Definition

Greengrass Core Definition in AWS represents a group of Greengrass core devices that manage and run local IoT applications. It defines the configuration for the core, which acts as the central hub in a Greengrass group, enabling local execution of AWS Lambda functions, messaging, and device communication even when disconnected from the cloud.

```
aws.greengrass_core_definition
```

## Fields

| Title                  | ID   | Type       | Data Type                                                                        | Description |
| ---------------------- | ---- | ---------- | -------------------------------------------------------------------------------- | ----------- |
| _key                   | core | string     |
| account_id             | core | string     |
| arn                    | core | string     | The ARN of the definition.                                                       |
| creation_timestamp     | core | string     | The time, in milliseconds since the epoch, when the definition was created.      |
| id                     | core | string     | The ID of the definition.                                                        |
| last_updated_timestamp | core | string     | The time, in milliseconds since the epoch, when the definition was last updated. |
| latest_version         | core | string     | The ID of the latest version associated with the definition.                     |
| latest_version_arn     | core | string     | The ARN of the latest version associated with the definition.                    |
| name                   | core | string     | The name of the definition.                                                      |
| tags                   | core | hstore_csv |