[icebraining]

Only with valid XML documents there is a schema attached that will describe these nodes with the type attribute.

http://json-schema.org/

What's the issue?

[bhaak]

It's still a draft (and if I may nit-pick, an expired draft).

It only has "complete structural validation". Which means it doesn't feature custom types.

Although it adds a workaround for the date issue by adding a handful of supported sub-types (http://json-schema.org/latest/json-schema-validation.html#an...)

It is far from what validation XML Schemas offer.