an Entity references as follows:
An `Expression` used to assign a value (right hand side) to an "L-Value" (left hand side). It usually involves one of the following operators: {=, *=, /=, %=, +=, -=, <<=, >>=, >>>=, &=, ^=, |=}.
![[RDF Data]](/fct/images/sw-rdf-blue.png)
