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

# IDeclarativeReferenceSource

- 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/ldm/declarativeModel/index.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).
> 

Source column of a reference and the grain object of the referenced dataset that it maps to.

**Signature:**

```typescript
export interface IDeclarativeReferenceSource 
```

## Properties

| Property | Modifiers | Type | Description |
| --- | --- | --- | --- |
| [column?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativereferencesource/index.md#ideclarativereferencesourcecolumn) |  | string | **_(ALPHA)_** _(Optional)_ |
| [dataType?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativereferencesource/index.md#ideclarativereferencesourcedatatype) |  | [DeclarativeColumnDataType](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.declarativecolumndatatype/index.md) | **_(ALPHA)_** _(Optional)_ |
| [isNullable?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativereferencesource/index.md#ideclarativereferencesourceisnullable) |  | boolean | **_(ALPHA)_** _(Optional)_ |
| [nullValue?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativereferencesource/index.md#ideclarativereferencesourcenullvalue) |  | string | **_(ALPHA)_** _(Optional)_ |
| [target](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativereferencesource/index.md#ideclarativereferencesourcetarget) |  | [IDeclarativeGrainIdentifier](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativegrainidentifier/index.md) | **_(ALPHA)_** |

## Property details

### IDeclarativeReferenceSource.column

> **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
column?: string;
```

### IDeclarativeReferenceSource.dataType

> **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
dataType?: DeclarativeColumnDataType;
```

### IDeclarativeReferenceSource.isNullable

> **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
isNullable?: boolean;
```

### IDeclarativeReferenceSource.nullValue

> **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
nullValue?: string;
```

### IDeclarativeReferenceSource.target

> **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
target: IDeclarativeGrainIdentifier;
```