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# Rack — Metadata

Subscribe to BMS-published metadata for all Rack point types.

**Direction:** Subscribe (receive)

## Channel

```text
BMS/v1/PUB/Metadata/Rack/{pointType}/{tagPath}
```

BMS-published metadata for all Rack points.
Includes integration-owned points which carries the `integration` field.

**MQTT wildcard examples**

* All rack metadata: `BMS/v1/PUB/Metadata/Rack/#`

### Parameters

| Parameter   | Description                                                                                                                                                                                                              |
| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `pointType` | Rack point type. Values: `RackLiquidSupplyTemperature`, `RackLiquidReturnTemperature`, `RackLiquidFlow`, `RackLiquidDifferentialPressure`, `RackLiquidDifferentialPressureSp`, `RackControlValvePosition` ... (14 total) |
| `tagPath`   | Must match the tagPath of the corresponding value topic exactly.                                                                                                                                                         |

## Message: Rack RackLiquidSupplyTemperature Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type   | Required | Description                                     |
| ------------------ | ------ | -------- | ----------------------------------------------- |
| `objectType`       | string | Yes      | Values: `Rack`                                  |
| `pointType`        | string | Yes      | Values: `RackLiquidSupplyTemperature`           |
| `rackLocationName` | string | Yes      | Human-readable rack name as defined by the BMS. |
| `rackLocationId`   | string | Yes      | Stable unique identifier for the rack.          |
| `engUnit`          | string | Yes      | Values: `C`                                     |

```json
{
  "objectType": "Rack",
  "pointType": "RackLiquidSupplyTemperature",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "engUnit": "C"
}
```

## Message: Rack RackLiquidReturnTemperature Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type   | Required | Description                                     |
| ------------------ | ------ | -------- | ----------------------------------------------- |
| `objectType`       | string | Yes      | Values: `Rack`                                  |
| `pointType`        | string | Yes      | Values: `RackLiquidReturnTemperature`           |
| `rackLocationName` | string | Yes      | Human-readable rack name as defined by the BMS. |
| `rackLocationId`   | string | Yes      | Stable unique identifier for the rack.          |
| `engUnit`          | string | Yes      | Values: `C`                                     |

```json
{
  "objectType": "Rack",
  "pointType": "RackLiquidReturnTemperature",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "engUnit": "C"
}
```

## Message: Rack RackLiquidFlow Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type   | Required | Description                                     |
| ------------------ | ------ | -------- | ----------------------------------------------- |
| `objectType`       | string | Yes      | Values: `Rack`                                  |
| `pointType`        | string | Yes      | Values: `RackLiquidFlow`                        |
| `rackLocationName` | string | Yes      | Human-readable rack name as defined by the BMS. |
| `rackLocationId`   | string | Yes      | Stable unique identifier for the rack.          |
| `engUnit`          | string | Yes      | Values: `LPM`                                   |

```json
{
  "objectType": "Rack",
  "pointType": "RackLiquidFlow",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "engUnit": "LPM"
}
```

## Message: Rack RackLiquidDifferentialPressure Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type   | Required | Description                                     |
| ------------------ | ------ | -------- | ----------------------------------------------- |
| `objectType`       | string | Yes      | Values: `Rack`                                  |
| `pointType`        | string | Yes      | Values: `RackLiquidDifferentialPressure`        |
| `rackLocationName` | string | Yes      | Human-readable rack name as defined by the BMS. |
| `rackLocationId`   | string | Yes      | Stable unique identifier for the rack.          |
| `engUnit`          | string | Yes      | Values: `kPa`                                   |

```json
{
  "objectType": "Rack",
  "pointType": "RackLiquidDifferentialPressure",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "engUnit": "kPa"
}
```

## Message: Rack RackLiquidDifferentialPressureSp Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type    | Required | Description                                                                                       |
| ------------------ | ------- | -------- | ------------------------------------------------------------------------------------------------- |
| `objectType`       | string  | Yes      | Values: `Rack`                                                                                    |
| `pointType`        | string  | Yes      | Values: `RackLiquidDifferentialPressureSp`                                                        |
| `rackLocationName` | string  | Yes      | Human-readable rack name as defined by the BMS.                                                   |
| `rackLocationId`   | string  | Yes      | Stable unique identifier for the rack.                                                            |
| `engUnit`          | string  | Yes      | Values: `kPa`                                                                                     |
| `isSetpoint`       | boolean | No       | Optional inclusion. Indicates this point is a target value written to control equipment behavior. |

```json
{
  "objectType": "Rack",
  "pointType": "RackLiquidDifferentialPressureSp",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "engUnit": "kPa",
  "isSetpoint": false
}
```

## Message: Rack RackControlValvePosition Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type   | Required | Description                                     |
| ------------------ | ------ | -------- | ----------------------------------------------- |
| `objectType`       | string | Yes      | Values: `Rack`                                  |
| `pointType`        | string | Yes      | Values: `RackControlValvePosition`              |
| `rackLocationName` | string | Yes      | Human-readable rack name as defined by the BMS. |
| `rackLocationId`   | string | Yes      | Stable unique identifier for the rack.          |
| `engUnit`          | string | Yes      | Values: `%`                                     |

```json
{
  "objectType": "Rack",
  "pointType": "RackControlValvePosition",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "engUnit": "%"
}
```

## Message: Rack RackPower Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type   | Required | Description                                     |
| ------------------ | ------ | -------- | ----------------------------------------------- |
| `objectType`       | string | Yes      | Values: `Rack`                                  |
| `pointType`        | string | Yes      | Values: `RackPower`                             |
| `rackLocationName` | string | Yes      | Human-readable rack name as defined by the BMS. |
| `rackLocationId`   | string | Yes      | Stable unique identifier for the rack.          |
| `engUnit`          | string | Yes      | Values: `kW`                                    |

```json
{
  "objectType": "Rack",
  "pointType": "RackPower",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "engUnit": "kW"
}
```

## Message: Rack RackLeakDetect Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type                            | Required | Description                                     |
| ------------------ | ------------------------------- | -------- | ----------------------------------------------- |
| `objectType`       | string                          | Yes      | Values: `Rack`                                  |
| `pointType`        | string                          | Yes      | Values: `RackLeakDetect`                        |
| `rackLocationName` | string                          | Yes      | Human-readable rack name as defined by the BMS. |
| `rackLocationId`   | string                          | Yes      | Stable unique identifier for the rack.          |
| `stateText`        | array\<map\<string, any>> | Yes      | State label mapping for leak detection.         |

```json
{
  "objectType": "Rack",
  "pointType": "RackLeakDetect",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "stateText": [
    {
      "value": 0,
      "text": "NoLeak"
    },
    {
      "value": 1,
      "text": "Leak"
    }
  ]
}
```

## Message: Rack RackLeakSensorFault Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type                            | Required | Description                                       |
| ------------------ | ------------------------------- | -------- | ------------------------------------------------- |
| `objectType`       | string                          | Yes      | Values: `Rack`                                    |
| `pointType`        | string                          | Yes      | Values: `RackLeakSensorFault`                     |
| `rackLocationName` | string                          | Yes      | Human-readable rack name as defined by the BMS.   |
| `rackLocationId`   | string                          | Yes      | Stable unique identifier for the rack.            |
| `stateText`        | array\<map\<string, any>> | Yes      | State label mapping for leak sensor fault status. |

```json
{
  "objectType": "Rack",
  "pointType": "RackLeakSensorFault",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "stateText": [
    {
      "value": 0,
      "text": "NoFault"
    },
    {
      "value": 1,
      "text": "Fault"
    }
  ]
}
```

## Message: Rack RackLeakDetectTray Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type                            | Required | Description                                                   |
| ------------------ | ------------------------------- | -------- | ------------------------------------------------------------- |
| `objectType`       | string                          | Yes      | Values: `Rack`                                                |
| `pointType`        | string                          | Yes      | Values: `RackLeakDetectTray`                                  |
| `rackLocationName` | string                          | Yes      | Human-readable rack name as defined by the BMS.               |
| `rackLocationId`   | string                          | Yes      | Stable unique identifier for the rack.                        |
| `integration`      | string                          | Yes      | Integration identifier responsible for publishing this value. |
| `stateText`        | array\<map\<string, any>> | Yes      | State label mapping for tray leak detection.                  |

```json
{
  "objectType": "Rack",
  "pointType": "RackLeakDetectTray",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "integration": "string",
  "stateText": [
    {
      "value": 0,
      "text": "NoLeak"
    },
    {
      "value": 1,
      "text": "Leak"
    }
  ]
}
```

## Message: Rack RackLiquidIsolationStatus Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type                            | Required | Description                                      |
| ------------------ | ------------------------------- | -------- | ------------------------------------------------ |
| `objectType`       | string                          | Yes      | Values: `Rack`                                   |
| `pointType`        | string                          | Yes      | Values: `RackLiquidIsolationStatus`              |
| `rackLocationName` | string                          | Yes      | Human-readable rack name as defined by the BMS.  |
| `rackLocationId`   | string                          | Yes      | Stable unique identifier for the rack.           |
| `stateText`        | array\<map\<string, any>> | Yes      | State label mapping for liquid isolation status. |

```json
{
  "objectType": "Rack",
  "pointType": "RackLiquidIsolationStatus",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "stateText": [
    {
      "value": 0,
      "text": "NotIsolated"
    },
    {
      "value": 1,
      "text": "Isolated"
    }
  ]
}
```

## Message: Rack RackElectricalIsolationStatus Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type                            | Required | Description                                          |
| ------------------ | ------------------------------- | -------- | ---------------------------------------------------- |
| `objectType`       | string                          | Yes      | Values: `Rack`                                       |
| `pointType`        | string                          | Yes      | Values: `RackElectricalIsolationStatus`              |
| `rackLocationName` | string                          | Yes      | Human-readable rack name as defined by the BMS.      |
| `rackLocationId`   | string                          | Yes      | Stable unique identifier for the rack.               |
| `stateText`        | array\<map\<string, any>> | Yes      | State label mapping for electrical isolation status. |

```json
{
  "objectType": "Rack",
  "pointType": "RackElectricalIsolationStatus",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "stateText": [
    {
      "value": 0,
      "text": "NotIsolated"
    },
    {
      "value": 1,
      "text": "Isolated"
    }
  ]
}
```

## Message: Rack RackLiquidIsolationRequest Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type                            | Required | Description                                                   |
| ------------------ | ------------------------------- | -------- | ------------------------------------------------------------- |
| `objectType`       | string                          | Yes      | Values: `Rack`                                                |
| `pointType`        | string                          | Yes      | Values: `RackLiquidIsolationRequest`                          |
| `rackLocationName` | string                          | Yes      | Human-readable rack name as defined by the BMS.               |
| `rackLocationId`   | string                          | Yes      | Stable unique identifier for the rack.                        |
| `integration`      | string                          | Yes      | Integration identifier responsible for publishing this value. |
| `stateText`        | array\<map\<string, any>> | Yes      | State label mapping for liquid isolation request.             |

```json
{
  "objectType": "Rack",
  "pointType": "RackLiquidIsolationRequest",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "integration": "string",
  "stateText": [
    {
      "value": 0,
      "text": "NoIsolationRequested"
    },
    {
      "value": 1,
      "text": "IsolationRequested"
    }
  ]
}
```

## Message: Rack RackElectricalIsolationRequest Metadata

**Content Type:** `application/json`

### Payload

| Name               | Type                            | Required | Description                                                   |
| ------------------ | ------------------------------- | -------- | ------------------------------------------------------------- |
| `objectType`       | string                          | Yes      | Values: `Rack`                                                |
| `pointType`        | string                          | Yes      | Values: `RackElectricalIsolationRequest`                      |
| `rackLocationName` | string                          | Yes      | Human-readable rack name as defined by the BMS.               |
| `rackLocationId`   | string                          | Yes      | Stable unique identifier for the rack.                        |
| `integration`      | string                          | Yes      | Integration identifier responsible for publishing this value. |
| `stateText`        | array\<map\<string, any>> | Yes      | State label mapping for electrical isolation request.         |

```json
{
  "objectType": "Rack",
  "pointType": "RackElectricalIsolationRequest",
  "rackLocationName": "string",
  "rackLocationId": "string",
  "integration": "string",
  "stateText": [
    {
      "value": 0,
      "text": "NoIsolationRequested"
    },
    {
      "value": 1,
      "text": "IsolationRequested"
    }
  ]
}
```