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+@prefix owl: <http://www.w3.org/2002/07/owl#> .
+@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+
+@prefix :   <http://metamaps.cc/owl/map.owl.ttl#> .
+@prefix mm:   <http://metamaps.cc/owl/map.owl.ttl#> .
+
+: a owl:Ontology ;
+	rdfs:label "Metamaps Map"@en .
+
+mm:Topic a owl:Class ;
+	rdfs:label "One topic on a metamap"@en .
+
+mm:Synapse a owl:Class ;
+  rdfs:label "Link between two topics on a metamap"@en .
+
+mm:topic1 a owl:ObjectProperty ;
+	a owl:FunctionalProperty ;
+	rdfs:label "first topic of a synapse"@en ;
+	rdfs:domain mm:Synapse ;
+	rdfs:range mm:Topic .
+
+mm:topic2 a owl:ObjectProperty ;
+	a owl:FunctionalProperty ;
+	rdfs:label "second topic of a synapse"@en ;
+	rdfs:domain mm:Topic ;
+	rdfs:range mm:Topic .
+
+mm:mapper a owl:ObjectProperty ;
+  a owl:FunctionalProperty ;
+  rdfs:label "Metamaps user who created this topic"@en ;
+  rdfs:domain mm:Topic ;
+  rdfs:range foaf:OnlineAccount .
+
+mm:direction a owl:ObjectProperty ;
+  a owl:FunctionalProperty ;
+  rdfs:label "from-to, both, or none"@en ;
+  rdfs:domain mm:Synapse ;
+  rdfs:range [ owl:oneOf mm:from-to, mm:both, mm:none ] .