/usr/share/GNUstep/DBModeler.app/DBModeler.desktop is in gnustep-dl2 0.12.0-15.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Encoding=UTF-8
Type=Application
Categories=X-GNUstep;
Name=DBModeler
Comment=GDL2 EOModel editor
Icon=/usr/lib/GNUstep/Applications/DBModeler.app/Resources/DBModeler.tiff
Exec=/usr/bin/openapp DBModeler
FilePattern=DBModeler.app;DBModeler;
MimeType=
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