/usr/include/arc/data/ is in nordugrid-arc-dev 5.0.5-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/arc/data-staging/DTR.h
/usr/include/arc/data-staging/DTRList.h
/usr/include/arc/data-staging/DTRStatus.h
/usr/include/arc/data-staging/DataDelivery.h
/usr/include/arc/data-staging/DataDeliveryComm.h
/usr/include/arc/data-staging/DataDeliveryLocalComm.h
/usr/include/arc/data-staging/DataDeliveryRemoteComm.h
/usr/include/arc/data-staging/Processor.h
/usr/include/arc/data-staging/Scheduler.h
/usr/include/arc/data-staging/TransferShares.h
/usr/include/arc/data/DataBuffer.h
/usr/include/arc/data/DataCallback.h
/usr/include/arc/data/DataHandle.h
/usr/include/arc/data/DataMover.h
/usr/include/arc/data/DataPoint.h
/usr/include/arc/data/DataPointDirect.h
/usr/include/arc/data/DataPointIndex.h
/usr/include/arc/data/DataSpeed.h
/usr/include/arc/data/DataStatus.h
/usr/include/arc/data/FileCache.h
/usr/include/arc/data/FileCacheHash.h
/usr/include/arc/data/FileInfo.h
/usr/include/arc/data/URLMap.h