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Re: [xml-dev] RE: List of differences between XML and JSON?

One minor point in JSON's favor: only one label per element compared
to (usually) two in XML. That saves a bit of verbosity and space.
Stephen D Green

On 30 April 2015 at 16:50, Costello, Roger L. <costello@mitre.org> wrote:
> Thank you for the fantastic feedback!
> I updated the list using your feedback. Is there anything else that should
> be added?  /Roger
> --------------------------------------
> JSON is often compared to XML. However, there are significant differences:
> -          XML supports comments, JSON does not.
> -          XML supports processing instructions, JSON does not.
> -          XML provides multiple syntaxes to express things (e.g., attribute
> values can be delimited by either a single or double quote, attributes can
> be in any order), JSON does not have such flexibility.
> -          XML child nodes (text, elements, comments, PIs) have order, the
> key/value pairs in JSON objects are unordered.
> -          XML uses canonicalization to convert XML into a standard form.
> Since ordering doesn't exist in JSON objects, a canonical form for JSON is
> problematic: with no canonical order, there's no standard byte stream.
> -          XML has namespaces, JSON does not.
> -          XML supports mixed content, JSON does not.
> -          XML has entities and notations, JSON does not.
> -          XML does not have arrays (although they can be simulated), JSON
> has arrays. JSON objects inside arrays have position, but no name; if an
> array is inside an object, then the name could be mapped from the key name
> for the array member; JSON arrays inside arrays inside an object are
> somewhat more of a challenge.
> -          XML uses different character sets (NCName) for markup than for
> content, JSON uses the same character set throughout the entire document.
> -          XML supports any character encoding scheme, JSON supports
> exclusively Unicode.
> -          XML has pointy brackets, JSON has curly and square ones.

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