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Subject: Re: JSON Profile and the Integer Data-Type

Hi Steven,

I've been doing a bit of thinking around the way one should infer a datatype.

If we get "3", according to the spec, as it stands today, it should be treated as a string since "3" is a _javascript_ string.
If we get 3, according to the spec, as it stands today, it should be treated as an integer...
If we get 3.12, we should get a double.

The number range in javscript is defined by ECMA - there's a good article here: http://www.hunlock.com/blogs/The_Complete_Javascript_Number_Reference

That said, what matters most of course is the XML definition of #integer and #double since it's what XACML uses.

Integer is defined here: http://www.w3.org/TR/xmlschema-2/#integer
double is defined here: http://www.w3.org/TR/xmlschema-2/#double

In what you wrote, you start from the Javscript / JSON definition. I'd rather start from the XML definition of the numbers since this is what is expected by the XACML standard.

Does that make more sense? I would need to rephrase the profile text to the following:

_javascript_ ”Number” with no fractional portion and within the integer range defined in the XML schema at http://www.w3.org/TR/xmlschema-2/#integer

Happy holidays!


On Tue, Dec 11, 2012 at 12:22 AM, Steven Legg <steven.legg@viewds.com> wrote:

Hi David,

I'm not sure how to interpret this description of values of the integer
data-type in section 3.4.1 of the JSON profile:

    _javascript_ ”Number” with no fractional portion and within integer range

By referencing _javascript_ it seems to be suggesting that a JSON number should
be parsed as a double and treated as an integer if that double value is a whole
number in the range of a 53-bit integer value. If that is the case, then 1.23e3
is an integer value and 9223372036854775807 is a double value. Can you clarify
what you intended ?


David Brossard, M.Eng, SCEA, CSTP
Product Manager
+46(0)760 25 85 75
Axiomatics AB
Skeppsbron 40
S-111 30 Stockholm, Sweden

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