---
title: CBAdvertisementDataServiceDataKey
framework: corebluetooth
role: symbol
role_heading: Global Variable
path: corebluetooth/cbadvertisementdataservicedatakey
---

# CBAdvertisementDataServiceDataKey

A dictionary that contains service-specific advertisement data.

## Declaration

```swift
let CBAdvertisementDataServiceDataKey: String
```

## Discussion

Discussion The keys (CBUUID objects) represent CBService UUIDs, and the values (NSData objects) represent service-specific data.

## See Also

### Advertisement Keys

- [CBAdvertisementDataLocalNameKey](corebluetooth/cbadvertisementdatalocalnamekey.md)
- [CBAdvertisementDataManufacturerDataKey](corebluetooth/cbadvertisementdatamanufacturerdatakey.md)
- [CBAdvertisementDataServiceUUIDsKey](corebluetooth/cbadvertisementdataserviceuuidskey.md)
- [CBAdvertisementDataOverflowServiceUUIDsKey](corebluetooth/cbadvertisementdataoverflowserviceuuidskey.md)
- [CBAdvertisementDataTxPowerLevelKey](corebluetooth/cbadvertisementdatatxpowerlevelkey.md)
- [CBAdvertisementDataIsConnectable](corebluetooth/cbadvertisementdataisconnectable.md)
- [CBAdvertisementDataSolicitedServiceUUIDsKey](corebluetooth/cbadvertisementdatasolicitedserviceuuidskey.md)