/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/ 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/namespace/contract/
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/contract/ContractNamespace.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/contract/package-frame.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/contract/package-summary.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/contract/package-tree.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/extender/
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/extender/ExtenderNamespace.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/extender/package-frame.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/extender/package-summary.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/extender/package-tree.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/service/
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/service/ServiceNamespace.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/service/package-frame.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/service/package-summary.html
/usr/share/doc/libosgi-compendium-java/api/org/osgi/namespace/service/package-tree.html