@prefix spin: <http://spinrdf.org/spin#> .
@prefix schema: <http://schema.org/> .  

<#property>
rdfs:label "property";
rdfs:comment "An Attribute of a Class. An Attribute being a Name=Value pairing.";
rdfs:subPropertyOf spin:constraint .

<#PropertyConstraint> 
a owl:Class ;
rdfs:subClassOf owl:Restriction ; 
rdfs:label "PropertyConstraint" ;
rdfs:comment """A constraint on a property of a class """  ;
is rdfs:range of <#property> .

schema:MedicalEntity
    a rdfs:Class ;
    rdfs:subClassOf schema:Thing ;
    <#property> [
	               a  <#PropertyConstraint> ;
                   <#predicate> schema:code ;
                   <#valueType> schema:MedicalCode ;
                   rdfs:label "code" ;
                   rdfs:comment """A medical code for the entity, taken from a controlled vocabulary or ontology
                                     such as ICD-9, DiseasesDB, MeSH, SNOMED-CT, RxNorm, etc."""
    ] .