This file is indexed.

/usr/share/kde4/services/perldoc.protocol is in kdesdk-kio-plugins 4:16.04.0-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[Protocol]
exec=kio_perldoc
protocol=perldoc
input=none
output=filesystem
defaultMimetype=text/html
Class=:local
reading=true
listing=Name
determineMimetypeFromExtension=false
Icon=application-x-perl