Re: RFC on Fragment Directives

On 05.09.2019 19:09, Roy T. Fielding wrote:
>> On Sep 5, 2019, at 9:37 AM, David Bokan <bokan@chromium.org
>> <mailto:bokan@chromium.org>> wrote:
>>
>> Hello all,
>>
>> I'd like to get some broader feedback on the proposal of a "fragment
>> directive". The basic idea is to encode a section of the URL fragment
>> for "UA instructions". e.g.
>>
>> https://example.org#fragment##fragment-directive
>> <https://example.org/#fragment##fragment-directive>
>
> Absolutely not. Only one # is allowed in a reference because some
> implementations parse
> left-to-right (correctly) and others parse right-to-left (incorrectly),
> and there is absolutely
> nothing you can say or do that will ever make that interoperable in
> practice.
> ...

Indeed.

But I wonder why exactly why parsing right-to-left would be incorrect?
Can you explain why?

Best regards, Julian

Received on Thursday, 5 September 2019 17:26:41 UTC