/usr/share/app-install/desktop/freemind:freemind.desktop is in app-install-data 15.10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | [Desktop Entry]
X-AppInstall-Package=freemind
X-AppInstall-Popcon=1151
X-AppInstall-Section=universe
Version=1.0
Name=FreeMind
Exec=/usr/bin/freemind
Terminal=false
Icon=FreeMindWindowIcon
Type=Application
MimeType=application/x-freemind;
Categories=Office;
GenericName=FreeMind
Comment=A free mind mapping tool
X-Ubuntu-Gettext-Domain=app-install-data
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