'instance:start date'

http://finregont.com/fro/xbrl/instance.ttl#startDate
Property 'instance:start date'

sxml:attribute

http://www.xbrl.org/2003/instance#startDate

rdf:type

owl:ObjectProperty

owl:DatatypeProperty

rdfs:label

start date

References
as rdfs:subClassOf (instance:Context period type, instance:Context period type)