/usr/include/osl/rating/ is in libosl-dev 0.6.0-3.3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/osl/rating/bradleyTerry.h
/usr/include/osl/rating/feature/
/usr/include/osl/rating/feature.h
/usr/include/osl/rating/feature/bigramAttack.h
/usr/include/osl/rating/feature/capture.h
/usr/include/osl/rating/feature/checkmate.h
/usr/include/osl/rating/feature/countEffect2.h
/usr/include/osl/rating/feature/escape.h
/usr/include/osl/rating/feature/karanari.h
/usr/include/osl/rating/feature/king8.h
/usr/include/osl/rating/feature/pattern.h
/usr/include/osl/rating/feature/pinAttack.h
/usr/include/osl/rating/feature/square.h
/usr/include/osl/rating/featureSet.h
/usr/include/osl/rating/group/
/usr/include/osl/rating/group.h
/usr/include/osl/rating/group/bigramGroup.h
/usr/include/osl/rating/group/captureGroup.h
/usr/include/osl/rating/group/checkmateGroup.h
/usr/include/osl/rating/group/escape.h
/usr/include/osl/rating/group/king8Group.h
/usr/include/osl/rating/group/patternGroup.h
/usr/include/osl/rating/group/pinGroup.h
/usr/include/osl/rating/group/squareGroup.h
/usr/include/osl/rating/range.h
/usr/include/osl/rating/ratedMove.h
/usr/include/osl/rating/ratedMoveVector.h
/usr/include/osl/rating/ratingEnv.h