Serializing a dataset to JSON and back

At the time when almost all the Delphi program was client/server or, in general, when the Delphi program was always connected to the database server in a fully-connected scenario, dataset serialization was a niche topic. There were really only a few situations where you really needed this kind of functionality in the core of your application. Were the '90! Now, however, making your data available to other programs or getting data from other software running somewhere in the world is the norm. In some cases, the other "programs" are not written in Delphi, so the DataSet.SaveToFile method, or another serialization that uses a proprietary or "exotic" format, is no longer enough.

Let's say we have a JavaScript frontend for our Delphi application server. Your data should be deDelphized (I've just coined this word) and should be independent from the backend programming language or framework used. Delphi has a lot of serialization facilities, but there isn...