AppStream documentation describes "desktop applications" in too restrictive of a manner.

[RokeJulianLockhart]

appstream/docs/xml/metainfo-desktopapp.xml

Lines 13 to 14 in 2f6010f

	A desktop application is an application which has a graphical user interface and is commonly used with mouse and keyboard. It also ships a Freedesktop
	<filename>.desktop</filename> file to be visible in application menus.

states:

A desktop application is an application which has a graphical user interface and is commonly used with mouse and keyboard. It also ships a Freedesktop .desktop file to be visible in application menus.

This would exclude all primarily capacitive input-based GUIs, of which many exist - anything designed primarily for smartphone usage, especially. Being more nondescript about the input method by stating something like "and is commonly used with mouse, keyboard or touch device" might be better.

As previously reported at gitlab.freedesktop.org/freedesktop/freedesktop/-/issues/1272.

[ximion]

This is fairly old text from 2012 - patches are welcome to update it :-)