/usr/share/app-install/desktop/gnome-weather:org.gnome.Weather.Application.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=gnome-weather
X-AppInstall-Popcon=42
X-AppInstall-Section=universe
Type=Application
Name=Weather
Comment=Show weather conditions and forecast
Icon=org.gnome.Weather.Application
Exec=gapplication launch org.gnome.Weather.Application
DBusActivatable=true
StartupNotify=true
Categories=GNOME;GTK;Utility;Core;
Keywords=Weather;Forecast;
X-Ubuntu-Gettext-Domain=app-install-data
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