Hyper-schema: Add comment about a possible "motivations" section

Author: awwright

jsonschema-hyperschema.xml

@@ -354,6 +354,8 @@
                 "Form"-like functionality can be defined by use of the "method" and "schema" keywords, which supplies a schema describing the data to supply to the server.
             </t>
 
+	         <!-- Possibly include a short section on motivations, including triples, resources, and progressive disclosure -->
+
             <section title="href" anchor="href">
                 <t>
                     The value of the "href" link description property is a template used to determine the target URI of the related resource.