SELECT DISTINCT ?class 
WHERE {
    ?class a owl:ObjectProperty .
	FILTER ( afn:namespace(?class) = "http://www.reportinghub.no/np/schema/npd#"  )
}

SELECT DISTINCT ?class ?superclass
WHERE {
    ?fact a ?class .
	FILTER ( afn:namespace(?fact) = "http://www.reportinghub.no/np/data/npd/" )
	?class rdfs:subClassOf* ?superclass . 
}

SELECT DISTINCT ?property
WHERE {
    ?fact a ?class .
	FILTER ( afn:namespace(?fact) = "http://www.reportinghub.no/np/data/npd/" )
	?fact ?property ?value .
}