| `id` | integer/string | yes | The ID or [URL-encoded path of the project](../README.md#namespaced-path-encoding). |
| `id` | integer/string | yes | The ID or [URL-encoded path of the project](../README.md#namespaced-path-encoding). |
| `name` | string | yes | The release name. |
| `name` | string | yes | The release name. |
| `tag_name` | string | yes | The tag where the release will be created from. |
| `tag_name` | string | yes | The tag where the release will be created from. |
| `description` | string | yes | The description of the release. You can use [markdown](../../user/markdown.md). |
| `description` | string | yes | The description of the release. You can use [markdown](../../user/markdown.md). |
| `ref` | string | no | If `tag_name` doesn't exist, the release will be created from `ref`. It can be a commit SHA, another tag name, or a branch name. |
| `ref` | string | yes, if `tag_name` doesn't exist | If `tag_name` doesn't exist, the release will be created from `ref`. It can be a commit SHA, another tag name, or a branch name. |
| `milestones` | array of string | no | The title of each milestone the release is associated with. |
| `milestones` | array of string | no | The title of each milestone the release is associated with. |
| `assets:links` | array of hash | no | An array of assets links. |
| `assets:links` | array of hash | no | An array of assets links. |
| `assets:links:name`| string | required by: `assets:links` | The name of the link. |
| `assets:links:name`| string | required by: `assets:links` | The name of the link. |
| `assets:links:url` | string | required by: `assets:links` | The url of the link. |
| `assets:links:url` | string | required by: `assets:links` | The url of the link. |
| `released_at` | datetime | no | The date when the release will be/was ready. Defaults to the current time. Expected in ISO 8601 format (`2019-03-15T08:00:00Z`). |
| `released_at` | datetime | no | The date when the release will be/was ready. Defaults to the current time. Expected in ISO 8601 format (`2019-03-15T08:00:00Z`). |