PREFIX st:   <http://ns.inria.fr/sparql-template/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX fun: <http://w3id.org/sparql-generate/fn/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX obo: <http://purl.obolibrary.org/obo/>
PREFIX swrl: <http://www.w3.org/2003/11/swrl#>

PREFIX ssn: <http://www.w3.org/ns/ssn/> 
PREFIX sosa: <http://www.w3.org/ns/sosa/> 

BASE <https://saref.etsi.org/documentation/>

TEMPLATE {

  TEMPLATE <classDescription.rqg>(<properties/en.properties>, ?topic, false) .

} WHERE {

  ?topic a owl:Restriction ; owl:onProperty [ owl:inverseOf ssn:wasOriginatedBy ] ; owl:allValuesFrom sosa:Observation 
#  ?topic a owl:Restriction ; owl:onProperty ssn:isProxyFor ; owl:allValuesFrom sosa:ObservableProperty .
} 