You can use an existing JSON or XML snippet as a template to create a model section that you can import into.

Using the default model and the class Detail, having the following JSON snippet in the clipboard

 <root>
  <person id='1'>
    <name>Alan</name>
    <url>http://www.google.com</url>
  </person>
  <person id='2'>
    <name>Louis</name>
    <url>http://www.yahoo.com</url>
  </person>
 </root>

Right click the class you want to use a root for your import, using for example Tajson and click on "Add attributes, assoc. and classes from clipboard json or xml", see below;

This will add classes Root1 and Person1 classes to your model liek this.

After this you can use JSonToObjects or Tajson to create objects from your JSON or XML.