from /usr/share/mime/packages/
	once modified should run update-mime-database
	or probably sufficient thus better, in user mode
		~/.local/share/mime/ then namely update-mime-database ~/.local/share/mime/
		https://unix.stackexchange.com/a/564888/486198

could be done for
	.images.json
	.aframe.component
	.extractedpdf.json
	.exported_author.json
	.layout.json
	.layout.json
	.packeddirectory.json
	.jxrstyles.json
	.aframe.entity
	.canvas
	.2dmap.png
	.webannotation.json

	.pmwiki
	.glb

<?xml version="1.0" encoding="UTF-8"?>
<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
   <mime-type type="application/x-jxr">
     <comment>jxr Model</comment>
     <glob pattern="*.jxr"/>
     <icon name="jxr"/>
   </mime-type>
</mime-info>