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

# IDeclarativeFact

- 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).
> 

Fact of a dataset.

**Signature:**

```typescript
export interface IDeclarativeFact 
```

## Properties

| Property | Modifiers | Type | Description |
| --- | --- | --- | --- |
| [description?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativefact/index.md#ideclarativefactdescription) |  | string | **_(ALPHA)_** _(Optional)_ |
| [id](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativefact/index.md#ideclarativefactid) |  | string | **_(ALPHA)_** |
| [isHidden?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativefact/index.md#ideclarativefactishidden) |  | boolean | **_(ALPHA)_** _(Optional)_ |
| [isNullable?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativefact/index.md#ideclarativefactisnullable) |  | boolean | **_(ALPHA)_** _(Optional)_ |
| [nullValue?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativefact/index.md#ideclarativefactnullvalue) |  | string | **_(ALPHA)_** _(Optional)_ |
| [sourceColumn?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativefact/index.md#ideclarativefactsourcecolumn) |  | string | **_(ALPHA)_** _(Optional)_ |
| [sourceColumnDataType?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativefact/index.md#ideclarativefactsourcecolumndatatype) |  | [DeclarativeColumnDataType](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.declarativecolumndatatype/index.md) | **_(ALPHA)_** _(Optional)_ |
| [tags?](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativefact/index.md#ideclarativefacttags) |  | string[] | **_(ALPHA)_** _(Optional)_ |
| [title](https://www.gooddata.ai/docs/gooddata-ui/latest/api-reference/sdk-model/sdk-model.ideclarativefact/index.md#ideclarativefacttitle) |  | string | **_(ALPHA)_** |

## Property details

### IDeclarativeFact.description

> **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
description?: string;
```

### IDeclarativeFact.id

> **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
id: string;
```

### IDeclarativeFact.isHidden

> **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
isHidden?: boolean;
```

### IDeclarativeFact.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;
```

### IDeclarativeFact.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;
```

### IDeclarativeFact.sourceColumn

> **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
sourceColumn?: string;
```

### IDeclarativeFact.sourceColumnDataType

> **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
sourceColumnDataType?: DeclarativeColumnDataType;
```

### IDeclarativeFact.tags

> **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
tags?: string[];
```

### IDeclarativeFact.title

> **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
title: string;
```