NSGI-LD

see https://www.etsi.org/deliver/etsi_gs/CIM/001_099/006/01.02.01_60/gs_CIM006v010201p.pdf

Note how 5.2 Reification with blank nodes is immediately diving into the technical uglity of Blank nodes. With the definition In RDF, a blank node (also called bnode) is a node in an RDF graph representing a resource for which a URI or literal is not given.

Basically this is all just a workaround for a missing separation of concerns in which not individual nodes are the core concept but subgraphs of a reasonable size that have a semantic meaning.