s4water:fabricationNumber a subproperty of saref:hasIdentifier ?

DPs s4watr:fabricationNumber, s4watr:hasFirmwareVersion, s4watr:hasHardwareVersion, s4watr:hasVersion, could apply to other extensions and could be promoted to SAREF Core.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information