Update exploration figures and types

directory.td.json

@@ -3,7 +3,7 @@
         "http://www.w3.org/ns/td",
         "https://w3c.github.io/wot-discovery/context/discovery-context.jsonld"
     ],
-    "@type": "DirectoryDescription",
+    "@type": "ThingDirectory",
     "title": "Thing Description Directory (TDD)",
     "version": {
         "instance": "1.0.0-alpha"
@@ -428,4 +428,4 @@
             ]
         }
     }
-}
+}

images/discovery-class-diagram-ontology.puml

@@ -0,0 +1,43 @@
+@startuml discovery-class-diagram-ontology
+hide members
+skinparam classBackgroundColor Azure
+
+class Thing as "td:Thing"
+note left: Thing Description (TD)
+class ThingDirectory as "discovery:ThingDirectory"
+class ThingLink as "discovery:ThingLink"
+
+class RegInfo as "discovery:RegistrationInformation" #Azure {
+  schema:dateCreated : xsd:dateTime
+  schema:dateModified : xsd:dateTime
+  schema:expires : xsd:dateTime
+  discovery:ttl : xsd:unsignedInt
+  discovery:retrieved : xsd:dateTime
+}
+show RegInfo attributes
+together {
+  Thing <|-- ThingDirectory
+  Thing <|-- ThingLink
+}
+Thing --> RegInfo : "discovery:hasRegistrationInformation"
+
+note as Prefixes
+Prefixes:
+  td: https://www.w3.org/2019/wot/td#
+  discovery: https://www.w3.org/2021/wot/discovery#
+  schema: http://schema.org/
+  xsd: http://www.w3.org/2001/XMLSchema#
+end note
+
+' note as Aliases
+' discovery:
+'   ThingDirectory: discovery:ThingDirectory
+'   ThingLink: discovery:ThingLink
+'   created: schema:dateCreated
+'   modified: schema:dateModified
+'   expires: schema:expires
+'   ttl: discovery:ttl
+'   retrieved: retrieved: dateTime
+' end note
+
+@enduml