# filename: ex046.ttl

@prefix ab:   <http://learningsparql.com/ns/addressbook#> .
@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl:  <http://www.w3.org/2002/07/owl#> .

ab:i0432  
   ab:firstName "Richard" ;
   ab:lastName  "Mutt" ;
   ab:spouse    ab:i9771 . 

ab:i8301  
   ab:firstName "Craig" ;
   ab:lastName  "Ellis" ;
   ab:patient   ab:i9771 . 

ab:i9771
   ab:firstName "Cindy" ; 
   ab:lastName  "Marshall" .  

ab:spouse
   rdf:type owl:SymmetricProperty ; 
   rdfs:comment "Identifies someone's spouse" .

ab:patient 
   rdf:type rdf:Property ;
   rdfs:comment "Identifies a doctor's patient" . 

ab:doctor 
   rdf:type rdf:Property ;
   rdfs:comment "Identifies a doctor treating the named resource" ;
   owl:inverseOf ab:patient .