/usr/share/app-install/desktop/pptview:pptview.desktop is in app-install-data 0.12.04.4.
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=pptview
X-AppInstall-Popcon=1406
X-AppInstall-Section=multiverse
Encoding=UTF-8
Categories=Application;Office
Comment=View PowerPoint presentations
Exec=pptview %f
Icon=ppt
MimeType=application/mspowerpoint;application/vnd.ms-powerpoint
Name=PowerPoint Viewer
StartupNotify=false
Type=Application
X-Ubuntu-Gettext-Domain=app-install-data
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