JSON, XML and YAML have their place in many existing environments like Drupal and Symfony. It is a requirement for using those platforms. For new applications, the choice is yours.

XML supports metadata, JSON is just attributes, so there is a challenge to represent metadata in JSON. Also, there is no support for namespaces in JSON. Finally, binary coded files, like graphics ...

What is JSON (JavaScript Object Notation)? JSON (JavaScript Object Notation) is a text-based, human-readable data interchange format used to exchange data between web clients and web servers. The ...