Re: [EXTERNAL] Re: Response for unsupported conditional request

> Start out with the base assumption that “unsupported” means unrecognized, for which there is the general requirement that recipients ignore unrecognized fields.

Is this true just for the conditional fields or for all fields? For example, can a recipient decide that it does not recognize "content-type" or "accept" fields and ignore these?

And when a client receives a 200 response from a request that included a conditional header, do they have any assurance that the conditional header was respected? It seems not.

Mike