#212: Added recommendation to use owl:imports sh:

Author: HolgerKnublauch

shacl12-core/index.html

@@ -1147,6 +1147,10 @@ <h4>Implicit Class Targets and sh:ShapeClass</h4>
 							If <code>s</code> is a <a>SHACL instance</a> of <code>sh:ShapeClass</code> in a <a>shapes graph</a> <code>SG</code>
 							then the set of <a>SHACL instances</a> of <code>s</code> in a data graph <code>DG</code> is a <a>target</a> from <code>DG</code> for <code>s</code> in <code>SG</code>.
 						</div>
+						<p>
+							Please keep in mind that <code>sh:ShapeClass</code> may not be understood to be a subclass of <code>rdfs:Class</code> by some SHACL-unaware implementations.
+							It is therefore recommended (but not required) that graphs that use <code>sh:ShapeClass</code> include an <code>owl:imports sh:</code> statement.
+						</p>
 						<p><em>The remainder of this section is informative.</em></p>
 						<p>
 							In the following example, <code>ex:Alice</code> is a focus node, because it is a <a>SHACL instance</a> of