The Service Discovery ApplicationProfile (SDAP) is a general Bluetooth profile
that must be supported by all devices and is used to query neighboring stations for their services. Service discovery by the Service Discovery Application Profile is the prerequisite for interoperability
between different Bluetooth devices. TheBluetooth systems use the SDAP profile to determine which services they can make available to partner stations.
The SDAP profile defines the Yellow Pages of the Bluetooth services in which all Bluetooth devices offer their services.