/usr/share/app-install/desktop/subtitlecomposer:kde4__subtitlecomposer.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=subtitlecomposer
X-AppInstall-Popcon=66
X-AppInstall-Section=universe
Type=Application
Name=Subtitle Composer
GenericName=Subtitle Editor
Comment=KDE subtitle editor
Icon=subtitlecomposer
Exec=subtitlecomposer %f -caption "%c"
MimeType=text/x-ssa;text/x-ass;text/x-microdvd;text/x-mpsub;application/x-subrip;text/x-subviewer;text/x-mplsub;text/x-tmplayer;text/x-tmplayer+;
Terminal=false
Categories=Qt;KDE;AudioVideo;
X-Ubuntu-Gettext-Domain=app-install-data
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