Registry for terminal DA responses?

Hello again, As I was working on my terminal application (people usually say "terminal emulator", but I avoid that term since I'm creating a new terminal rather than emulating one made by someone else), the following question came up: there is a control sequence called Device Attributes (DA) whose generic form CSI c requests that the terminal send another DA sequence back to the host to identify itself. Each DEC terminal, for example, has a unique DA response. This is what the ECMA 48 standard (equivalent of ISO 6429) says: 8.3.24 DA - DEVICE ATTRIBUTES Notation: (Ps) Representation: CSI Ps 06/03 Parameter default value: Ps = 0 With a parameter value not equal to 0, DA is used to identify the device which sends the DA. The parameter value is a device type identification code according to a register which is to be established. If the parameter value is 0, DA is used to request an identifying DA from a device. My question is: does anyone know if such a registry exists and where can one apply for a DA code assignment? TIA, MS