David Orchard wrote:
Well, what I meant was that I don't know what down to earth means in
this context, namely for writing a spec. Down to earth applied to a
policy language specification is absurd. We need a language that is
unambigous and clear to get to interoperable implementations.
FWIW I found Ian's use of English prose in the HTML 5 parsing spec to be
clear and helpful in producing an implementation. There are now multiple
implementations of that spec which are believed to have good
interoperability (they all pass a common test suite of moderate size).
I have not reviewed the relevant section of the Access Control spec in
enough detail to know whether it is currently as clear as HTML 5, but I
see no reason /in principle/ why it could not be made clear enough to
produce multiple interoperable implementations.