---
schema_version: "1"
id: 05d37d62fe252958a537ac5d233f0d4a4b8d64c836bb6398c828a2be5a90a4b1
title: GroupDefinition
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/marketing-cloud/guides/mc-apis/groupdefinition.md
canonical_url: https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/groupdefinition.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: 03f6bffa693bd3d536904e8225a7bebf6a92e26f2de8ac086b82c79fe58c52ae
products:
  - Marketing Cloud Engagement APIs and Programmatic Languages
  - Marketing Cloud
---
# GroupDefinition

An object that manages rules and metadata for groups in a List-based data model.

## Properties

| Name                  | Data Type                                      | Description                                                                                                                               |
| --------------------- | ---------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| `Client`              | [ClientID](https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/clientid.md) object                 | Specifies the account ownership and context of an object.                                                                                 |
| `CorrelationID`       | String                                         | Identifies correlation of objects across several requests.                                                                                |
| `CreatedDate`         | DateTime                                       | The date and time when the object was created.                                                                                            |
| `CustomerKey`         | String                                         | User-supplied unique identifier for an object within an object type. This property corresponds to the external key assigned to an object. |
| `Description`         | String                                         | Describes and provides information regarding the object.                                                                                  |
| `ID`                  | Int                                            | Read-only identifier for an object. Some objects use the ObjectID property as a unique ID.                                                |
| `InteractionObjectID` | String                                         | Returns associated ID for activities within the asynchronous process of the overall conversation or program.                              |
| `Keyword`             | String                                         | Not used.                                                                                                                                 |
| `ModifiedDate`        | DateTime                                       | The date and time when the object was last modified.                                                                                      |
| `Name`                | String                                         | Name of the object or property.                                                                                                           |
| `ObjectID`            | String                                         | System-controlled, read-only text string identifier for object.                                                                           |
| `ObjectState`         | String                                         | Not used.                                                                                                                                 |
| `Owner`               | [Owner](https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/owner.md) object                       | Describes account ownership of subscriber in an on-your-behalf account.                                                                   |
| `PartnerKey`          | String                                         | Unique identifier provided by partner for an object. This property is accessible only via API.                                            |
| `PartnerProperties`   | Array of [APIProperty](https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/apiproperty.md) objects | A collection of metadata supplied by the client and stored by the system. These properties are accessible only via API.                   |

## Related Items

- [Supported Operations for Objects and Methods](https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/supported_operations_for_objects_and_methods.md)