/usr/include/scim-1.0/ is in libscim-dev 1.4.18-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/scim-1.0/gtk/
/usr/include/scim-1.0/gtk/scimkeyselection.h
/usr/include/scim-1.0/gtk/scimstringview.h
/usr/include/scim-1.0/gtk/scimtrayicon.h
/usr/include/scim-1.0/scim.h
/usr/include/scim-1.0/scim_attribute.h
/usr/include/scim-1.0/scim_backend.h
/usr/include/scim-1.0/scim_bind.h
/usr/include/scim-1.0/scim_compose_key.h
/usr/include/scim-1.0/scim_config_base.h
/usr/include/scim-1.0/scim_config_module.h
/usr/include/scim-1.0/scim_config_path.h
/usr/include/scim-1.0/scim_connection.h
/usr/include/scim-1.0/scim_debug.h
/usr/include/scim-1.0/scim_event.h
/usr/include/scim-1.0/scim_exception.h
/usr/include/scim-1.0/scim_filter.h
/usr/include/scim-1.0/scim_filter_manager.h
/usr/include/scim-1.0/scim_filter_module.h
/usr/include/scim-1.0/scim_frontend.h
/usr/include/scim-1.0/scim_frontend_module.h
/usr/include/scim-1.0/scim_global_config.h
/usr/include/scim-1.0/scim_helper.h
/usr/include/scim-1.0/scim_helper_manager.h
/usr/include/scim-1.0/scim_helper_module.h
/usr/include/scim-1.0/scim_hotkey.h
/usr/include/scim-1.0/scim_iconv.h
/usr/include/scim-1.0/scim_imengine.h
/usr/include/scim-1.0/scim_imengine_module.h
/usr/include/scim-1.0/scim_lookup_table.h
/usr/include/scim-1.0/scim_module.h
/usr/include/scim-1.0/scim_object.h
/usr/include/scim-1.0/scim_panel_agent.h
/usr/include/scim-1.0/scim_panel_client.h
/usr/include/scim-1.0/scim_panel_common.h
/usr/include/scim-1.0/scim_pointer.h
/usr/include/scim-1.0/scim_property.h
/usr/include/scim-1.0/scim_signals.h
/usr/include/scim-1.0/scim_slot.h
/usr/include/scim-1.0/scim_socket.h
/usr/include/scim-1.0/scim_trans_commands.h
/usr/include/scim-1.0/scim_transaction.h
/usr/include/scim-1.0/scim_types.h
/usr/include/scim-1.0/scim_utility.h
/usr/include/scim-1.0/x11/
/usr/include/scim-1.0/x11/scim_x11_utils.h