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Re: RE: List of differences between XML and JSON?

  • From: Thomas Passin <list1@tompassin.net>
  • To: "xml-dev@lists.xml.org" <xml-dev@lists.xml.org>
  • Date: Sat, 02 May 2015 12:57:07 -0400

Re:  RE: List of differences between XML and JSON?
You can make subsets of XML that do pretty much the same things as JSON, when interpreted properly. That doesn't mean you get to say that they have the same capabilities in general.

With JSON, you can send me objects (sets of name-value pairs) and value lists, where "values" can be objects, numbers, lists, or strings. That's what you can do.

You can use XML to send those things too, but an XML document isn't limited to only that. So JSON is essentially similar to a subset of XML. If these capabilities happen to be what you want, then fine, and you'll probably be happier with JSON.

If you are examining differences between JASON and XML, it isn't going to be helpful to start by pruning away things that make them different.

On 5/2/2015 10:19 AM, Costello, Roger L. wrote:
Thomas Passin wrote:

Remember that XML is not actually a language but a toolkit for
specifying languages.
By that I believe you mean that I can define an XML vocabulary and
then create many XML instances which use that vocabulary. For
example, I can define a BookStore XML vocabulary and then create many
Bookstore instances, I can define a Cellphone XML vocabulary and then
create many Cellphone instances. I use XML Schema to define each XML
vocabulary.

Right?

JSON is a language.
With JSON I can define a JSON vocabulary and then create many JSON
instances which use that vocabulary. For example, I can define a
BookStore JSON vocabulary and then create many Bookstore instances, I
can define a Cellphone JSON vocabulary and then create many Cellphone
instances. I use JSON Schema to define each JSON vocabulary.

Aren't XML and JSON equivalent in the sense that they are syntaxes
from which many XML-formatted/JSON-formatted languages may be
created?

/Roger






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