We noticed a minor point of confusion around the Media Type parameter formatting for extensions/profiles:

The examples in section 5.4.1 show a space between the ; and ext, but the examples in the atomic operations extension spec all exclude this space. Are both options valid?

Section 5.4 talks about spaces in the extension, but doesn't not provide an example of the space separated list of URI (and where the quotes mentioned in the Note belong), so it is hard to interpret the correct syntax, especially for multiple values of a parameter.

I suspect that the post ; space is optional but that a correct example of the a parameter with multiple values would be `ext="http://uri.ex/1 http://uri.ex/2".