Have a look at IEC CIM (Common Information Model) - https://en.m.wikipedia.org/wiki/Common_Information_Model_(electricity) - https://zepben.bitbucket.io/ci

Have a look at IEC CIM (Common Information Model) - https://en.m.wikipedia.org/wiki/Common_Information_Model_(electricity) - https://zepben.bitbucket.io/cim/cim100/ - https://ontology.tno.nl/IEC_CIM/