/usr/share/doc/libosgi-compendium-java/api/org/osgi/service/subsystem/ is in libosgi-compendium-java-doc 5.0.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libosgi-compendium-java/api/org/osgi/service/subsystem/Subsystem.State.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/service/subsystem/Subsystem.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/service/subsystem/SubsystemConstants.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/service/subsystem/SubsystemException.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/service/subsystem/SubsystemPermission.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/service/subsystem/package-frame.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/service/subsystem/package-summary.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/service/subsystem/package-tree.html