format=metadata in SSAP

[Markus Dolensky]

Igor Chilingarian wrote:
> 2) question to DAL WG: is there a way to distinguish between mandatory,
> optional, and service-specific parameters on the level of format=metadata
> response?

For the time being the recommended convention is to put mandatory + 
optional (=reserved) parameter names in uppercase and service defined 
once in lowercase. It is NOT valid to introduce service specific 
parameter names by just changing the case of a reserved name.

Cheers,
Markus