Added ttl to rdf example

doc/id_ttl_to_rdf.md

@@ -0,0 +1,32 @@
+```ttl
+as:id a owl:DatatypeProperty ,
+        owl:FunctionalProperty,
+        owl:DeprecatedProperty ;
+  rdfs:label "id"@en ;
+  rdfs:range xsd:anyURI ;
+  rdfs:domain [
+    a owl:Class ;
+    owl:unionOf (as:Link as:Object)
+  ] .
+```
+
+This ttl def can be written as rdf N-Triples:
+
+```
+as:id rdf:type owl:DatatypeProperty .
+as:id rdf:type owl:FunctionalProperty .
+as:id rdf:type owl:DeprecatedProperty .
+
+as:id rdfs:label "id"@en .
+
+as:id rdfs:range xsd:anyURI .
+
+as:id rdfs:domain _:do .
+_:do rdf:type owl:Class .
+_:do owl:unionOf (as:Link as:Object) .
+
+---
+
+_:Object as:id "http://an.uri"
+_:Object as:type _:do
+```