Re: [apps-discuss] RFC 6570: what is the dot for in section 3?

It's there as a convenience to implementations, so they can model data structures (e.g., dictionaries) easily.

On 16/03/2013, at 12:23 AM, Francis Galiegue <fgaliegue@gmail.com> wrote:

> Hello,
> 
> The grammar for a variable name reads as such:
> 
>     varspec       =  varname [ modifier-level4 ]
>     varname       =  varchar *( ["."] varchar )
>     varchar       =  ALPHA / DIGIT / "_" / pct-encoded
> 
> I fail to see any mention of the dot anywhere else in the document
> when it appears in this context and I don't see any example either,
> not even in appendix A. And the "varchar" grammar token adds to the
> confusion since it seems to indicate the dot has a special role.
> 
> If, for example I have a variable foo defined as:
> 
> { "bar": 1, "baz": 2 }
> 
> what is "foo.bar"? Does it refer to another variable entirely, or is
> it value of key "bar" in associate array "foo"?
> 
> --
> Francis Galiegue, fgaliegue@gmail.com
> JSON Schema in Java: http://json-schema-validator.herokuapp.com
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Mark Nottingham   http://www.mnot.net/