The Connecting Properties to JSON Data Source documentation page in QDS contains unusable information and instructions.

The first part refers to a "Model Editor" feature that is not enabled by default in QDS and, therefore, is not usable by most users.

The second part ("Connecting a Text Property to a Data Source") is a follow-up to the first part, and cannot be used as-is without the Model Editor feature.

As for the last part, without clear instructions on how to add a JsonBackend to a QDS project, the information is also unusable.

There is an example of the JsonBackend here: https://git.qt.io/public-demos/qtdesign-studio/-/tree/master/playground/JsonTest/content?ref_type=heads, but this is not mentioned in the documentation page.

A suggestion is to either remove the page, or rework it entirely to be based on the public example.