Re: [apps-discuss] Question about URI template and expansion of an empty list

Joe Gregorio <joe@bitworking.org> Wed, 17 April 2013 14:41 UTC

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Date: Wed, 17 Apr 2013 10:41:35 -0400
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From: Joe Gregorio <joe@bitworking.org>
To: Francis Galiegue <fgaliegue@gmail.com>
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Subject: Re: [apps-discuss] Question about URI template and expansion of an empty list
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On Wed, Apr 17, 2013 at 10:31 AM, Francis Galiegue <fgaliegue@gmail.com> wrote:
> On Wed, Apr 17, 2013 at 4:03 PM, Joe Gregorio <joe@bitworking.org> wrote:
> [...]
>>>
>>>
>>> https://github.com/dret/uritemplate-test/blob/master/spec-examples-by-section.json
>>> (line 234) says it's "X", but i am really interested in the "why"
>>> explanation as well. http://tools.ietf.org/html/rfc6570#section-3.2.5 says
>>> that
>>
>> The answer is in the text you quote:
>>
>> "for each defined variable in the variable-list, append '.' to the
>> result string and then perform variable expansion"
>>
>> The set of variables in the variable list is the empty set, so no '.'
>> is appended.
>>
>
> Is it really the case?

Yes.

> I don't see an empty list as an undefined variable.

Which is why an addendum should be added to the spec.

>
> Or it would mean that the first thing which needs to be done is expand
> variable values (scalars, lists, associative arrays) before "grouping"
> them.
>
>
> --
> Francis Galiegue, fgaliegue@gmail.com
> JSON Schema in Java: http://json-schema-validator.herokuapp.com
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Joe Gregorio        http://bitworking.org