This file is indexed.

/usr/share/mime-info/gnomecatalog.keys is in gnomecatalog 0.3.4.2-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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application/x-gcatalog
	open=gnomecatalog %f
	view=gnomecatalog %f
	icon-filename=/usr/share/gnomecatalog/pixmaps/gcatalog.png