I recently checked if Qt Creator supports any kind of JSON validation (e.g. 
JSON lint). I found this page:

http://doc.qt.io/qtcreator/creator-checking-code-syntax.html#checking-json-data-structure

Quoting the section:

“You can run static checks on the QML and JavaScript code in your project to 
find common problems.

Qt Creator validates instances of JSON entities against A JSON Media Type for 
Describing the Structure and Meaning of JSON Documents. However, Qt Creator 
does not understand the entire specification.

A JSON schema defines the structure of JSON data. It determines what JSON data 
is required for an application and how to interact with it.

The specification does not define how to map JSON instances with JSON schemas. 
Qt Creator looks for a JSON schema file with a name that matches the name of 
the JSON instance file in the user configuration folder. For example, 
~/config/QtProject/qtcreator/json on Linux and macOS and 
C:\Users\username\AppData\Roaming\QtCreator\qtcreator\json in Windows. To check 
JSON data structure, copy the JSON schema file to the above folder.”

Does this mean that if I want to validate a regular JSON file, I need to have 
my own schema? Why not provide a default schema so that there is an equivalent 
to the results that e.g. JSON lint would give? Just for kicks, I tried running 
Ctrl+Shift+C with a JSON file open (which couldn’t be loaded by QJsonDocument 
due to errors), but Creator didn’t show any entries for it in the Issues pane.

Also, why are the “Checking JavaScript and QML Syntax” and “List of JavaScript 
and QML Checks” sub-sections of a JSON section? QML and JavaScript are not 
subsets of JSON, and it makes reading this entire section very difficult.

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