> Documentation index: https://www.gooddata.ai/docs/gooddata-ui/llms.txt lists every page of these docs as Markdown.

# IPublisherSlotBaseV1

- Package: [@gooddata/sdk-model](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/index.md)
- Kind: interface
- Stability: alpha
- Source: https://github.com/gooddata/gooddata-ui-sdk/blob/rel/11.64/libs/sdk-model/src/publisher/v1/slot.ts

> **Alpha API.** Initial API, highly likely to change outside SemVer. Don't build on it in production. See [API maturity](https://www.gooddata.ai/docs/gooddata-ui/latest/integrations/platform/api-maturity/index.md).
> 

Structural base of every document slot.

**Signature:**

```typescript
export interface IPublisherSlotBaseV1 
```

## Remarks

Parsers written against this base can skip slot types introduced by a newer content version instead of failing.

## Properties

| Property | Modifiers | Type | Description |
| --- | --- | --- | --- |
| [localIdentifier](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ipublisherslotbasev1/index.md#ipublisherslotbasev1localidentifier) |  | string | **_(ALPHA)_** Identifier unique within the page body. The layout tree references it, and it is the join key when a document fills a template's slots. Regenerated when a page is cloned into template content so repeated use of one page stays unique. |
| [placeholder?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ipublisherslotbasev1/index.md#ipublisherslotbasev1placeholder) |  | [IPublisherSlotPlaceholderV1](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ipublisherslotplaceholderv1/index.md) | **_(ALPHA)_** _(Optional)_ Present when the slot is an unfilled placeholder. |
| [type](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ipublisherslotbasev1/index.md#ipublisherslotbasev1type) |  | string | **_(ALPHA)_** |

## Property details

### IPublisherSlotBaseV1.localIdentifier

> **Alpha API.** Initial API, highly likely to change outside SemVer. Don't build on it in production. See [API maturity](https://www.gooddata.ai/docs/gooddata-ui/latest/integrations/platform/api-maturity/index.md).
> 

Identifier unique within the page body. The layout tree references it, and it is the join key when a document fills a template's slots. Regenerated when a page is cloned into template content so repeated use of one page stays unique.

**Signature:**

```typescript
localIdentifier: string;
```

### IPublisherSlotBaseV1.placeholder

> **Alpha API.** Initial API, highly likely to change outside SemVer. Don't build on it in production. See [API maturity](https://www.gooddata.ai/docs/gooddata-ui/latest/integrations/platform/api-maturity/index.md).
> 

Present when the slot is an unfilled placeholder.

**Signature:**

```typescript
placeholder?: IPublisherSlotPlaceholderV1;
```

### IPublisherSlotBaseV1.type

> **Alpha API.** Initial API, highly likely to change outside SemVer. Don't build on it in production. See [API maturity](https://www.gooddata.ai/docs/gooddata-ui/latest/integrations/platform/api-maturity/index.md).
> 

**Signature:**

```typescript
type: string;
```