update core outline section

Author: YoucTagh

shacl12-core/index.html

@@ -464,9 +464,18 @@ <h2>Document Outline</h2>
 			<p>
 				The introduction includes a <a href="#terminology">Terminology</a> section.
 			</p>
+			<p>
+				The sections 2 and 3 cover SHACL shapes, constraints, as well as property paths.
+			</p>
+			<p>
+				The section 4 introduces node expressions, while section 5 defines validation in SHACL.
+			</p>
+			<p>
+				The section 6 defines the built-in SHACL Core constraint components. Meanwhile, section 7 discusses non-validating properties.
+			</p>
 			<p>
 				The syntax of SHACL is RDF.
-				The examples in this document use Turtle [[rdf12-turtle]] and (in one instance) JSON-LD [[json-ld]].
+				The examples in this document use Turtle [[rdf12-turtle]], JSON-LD [[json-ld]] and SHACL-C.
 				Other RDF serializations such as RDF/XML may be used in practice.
 				The reader should be familiar with basic RDF concepts [[rdf12-concepts]] such as triples.
 			</p>