/usr/share/app-install/desktop/geogebra:geogebra.desktop is in app-install-data 14.04.0.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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X-AppInstall-Package=geogebra
X-AppInstall-Popcon=469
X-AppInstall-Section=universe
Name=GeoGebra
GenericName=Dynamic mathematics software
Comment=Create interactive mathematical constructions and applets.
Exec=geogebra %F
Icon=geogebra
Terminal=false
Type=Application
StartupNotify=true
StartupWMClass=geogebra-GeoGebra
Categories=Education;Math;
MimeType=application/vnd.geogebra.file;application/vnd.geogebra.tool;
X-Ubuntu-Gettext-Domain=app-install-data
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