Anybody know Jacqueline (JAQL)?

Hello, Please I'm looking for an example of usage JSON data type and JAQL (Jacqueline). I have default branch compiled, running and created a table with JSON. I access the database through JDBC client (Workbench/J). I inserted a row into the table with JSON column. How can I query the column containing JSON value using JAQL? I might be totally missing the point. Thank you for any hints. Radovan