The node that is used as the subject of the reifying quad. This can be a blank node or a named node, but not a triple term.
Contains the constant "Reifier".
The triple that is being reified. The subject and object of this triple can be a triple term, but the predicate must be a named node.
RDF 1.2 Reifier - a blank node or named node that reifies a triple.
Syntax:
<< subject predicate object >>or<< subject predicate object ~ reifierId >>