/usr/include/KF5/purpose/ is in libkf5purpose-dev 1.1-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/purpose/Purpose/
/usr/include/KF5/purpose/Purpose/AlternativesModel
/usr/include/KF5/purpose/Purpose/Configuration
/usr/include/KF5/purpose/Purpose/Job
/usr/include/KF5/purpose/Purpose/PluginBase
/usr/include/KF5/purpose/purpose/
/usr/include/KF5/purpose/purpose/alternativesmodel.h
/usr/include/KF5/purpose/purpose/configuration.h
/usr/include/KF5/purpose/purpose/job.h
/usr/include/KF5/purpose/purpose/pluginbase.h
/usr/include/KF5/purpose/purpose/purpose_export.h
/usr/include/KF5/purpose/purpose_version.h
/usr/include/KF5/purposewidgets/PurposeWidgets/
/usr/include/KF5/purposewidgets/PurposeWidgets/Menu
/usr/include/KF5/purposewidgets/purposewidgets/
/usr/include/KF5/purposewidgets/purposewidgets/menu.h