> ## Documentation Index
> Fetch the complete documentation index at: https://docs.forterulesengine.io/llms.txt
> Use this file to discover all available pages before exploring further.

# TrackerMetadataStruct

> v0.20.5

> **TrackerMetadataStruct** = `object`

Defined in: [src/modules/types.ts:403](https://github.com/Forte-Service-Company-Ltd/forte-rules-engine-sdk/blob/40cc8388cecd8ee445b00b9df2b681cff8552ece/src/modules/types.ts#L403)

Metadata for a tracker

## Properties

### arrayType

> **arrayType**: `number`

Defined in: [src/modules/types.ts:413](https://github.com/Forte-Service-Company-Ltd/forte-rules-engine-sdk/blob/40cc8388cecd8ee445b00b9df2b681cff8552ece/src/modules/types.ts#L413)

Array Value Type

***

### initialKeys

> **initialKeys**: `string`\[]

Defined in: [src/modules/types.ts:409](https://github.com/Forte-Service-Company-Ltd/forte-rules-engine-sdk/blob/40cc8388cecd8ee445b00b9df2b681cff8552ece/src/modules/types.ts#L409)

Initial keys for mapped trackers

***

### initialValue

> **initialValue**: `string`

Defined in: [src/modules/types.ts:407](https://github.com/Forte-Service-Company-Ltd/forte-rules-engine-sdk/blob/40cc8388cecd8ee445b00b9df2b681cff8552ece/src/modules/types.ts#L407)

Initial value

***

### initialValues

> **initialValues**: `string`\[]

Defined in: [src/modules/types.ts:411](https://github.com/Forte-Service-Company-Ltd/forte-rules-engine-sdk/blob/40cc8388cecd8ee445b00b9df2b681cff8552ece/src/modules/types.ts#L411)

Initial values for mapped trackers

***

### trackerName

> **trackerName**: `string`

Defined in: [src/modules/types.ts:405](https://github.com/Forte-Service-Company-Ltd/forte-rules-engine-sdk/blob/40cc8388cecd8ee445b00b9df2b681cff8552ece/src/modules/types.ts#L405)

Name of the tracker