For parts of a triple, consider using "kinds" instead of "types" in primer

[kvistgaard]

In the sentence

In the next three subsections, we discuss the three types of RDF data that occur in triples: IRIs, literals and blank nodes.

consider using "kinds of RDF data", instead of types to avoid confusion with types in the sense of datatypes and rdf:type , and to be consistent with sh:nodeKind.

The other issue in this statement, "three" instead of "four", is raised in #14
This makes it inconsistent with

There can be four kinds of nodes in an RDF graph: IRIs, literals, blank nodes, and quoted triples.

from RDF 1.2 Concepts and Abstract Syntax