/usr/include/openscap/ is in libopenscap-dev 1.0.9-1+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/openscap/check_engine_plugin.h
/usr/include/openscap/cpe_dict.h
/usr/include/openscap/cpe_lang.h
/usr/include/openscap/cpe_name.h
/usr/include/openscap/cve_nvd.h
/usr/include/openscap/cvss_score.h
/usr/include/openscap/oscap.h
/usr/include/openscap/oscap_error.h
/usr/include/openscap/oscap_reference.h
/usr/include/openscap/oscap_text.h
/usr/include/openscap/oval_adt.h
/usr/include/openscap/oval_agent_api.h
/usr/include/openscap/oval_agent_xccdf_api.h
/usr/include/openscap/oval_definitions.h
/usr/include/openscap/oval_directives.h
/usr/include/openscap/oval_probe.h
/usr/include/openscap/oval_probe_handler.h
/usr/include/openscap/oval_probe_session.h
/usr/include/openscap/oval_results.h
/usr/include/openscap/oval_system_characteristics.h
/usr/include/openscap/oval_types.h
/usr/include/openscap/oval_variables.h
/usr/include/openscap/oval_version.h
/usr/include/openscap/scap_ds.h
/usr/include/openscap/xccdf_benchmark.h
/usr/include/openscap/xccdf_policy.h
/usr/include/openscap/xccdf_session.h