Tutorial on objects and the cell.recon object

What's an object?
You've probably seen this wiki page when trying to access the deeper reconciliation fields in Open Refine:

https://github.com/OpenRefine/OpenRefine/wiki/Variables

This is a pretty confusing page, so let me give a little background about objects. An object is a programming language structure that's basically a container for a bunch of other things, including other objects. The object itself cannot be manipulated, but everything contained in that object can.
Open Refine has a master object and then either objects or fields contained within it.

A field will either yield a string, a boolean, a null, a number, or it will have deeper fields.