# VoucherifySdk::PublicationsListResponseBodyPublicationsItemMetadata ## Properties | Name | Type | Description | Notes | | ---- | ---- | ----------- | ----- | | **source_type** | **String** | Defines the type of the distribution source. | [optional] | | **source_id** | **String** | Unique identifier of the distribution source. | [optional] | | **distribution_id** | **String** | Unique identifier of the distribution. | [optional] |