[gdtfmaster]

Sure.

The device definitions come as GDTF files, see the spec and other projects that utilize GDTF here [1]

Juce framework [2]

OrganicUI [3]

[1] https://gdtf.eu/docs/list-of-projects/

[2] https://juce.com/

[3] https://github.com/benkuper/juce_organicui/

[pabs3]

Is there a linter/checker for this file format?

[gdtfmaster]

There are xsd and schematron schemas [1], see docs generated from the xsd [2]. The GDTF editor on https://gdtf-share.com [3] also has deeper internal validation some of the data logic.

[1] https://github.com/mvrdevelopment/spec

[2] https://gdtf.eu/gdtf/xsd/xsd/

[3] https://gdtf-share.com/