'variable:fallback value'

http://finregont.com/fro/xbrl/formula/variable.ttl#fallbackValue
Property 'variable:fallback value'

sxml:attribute

http://xbrl.org/2008/variable#fallbackValue

rdf:type

owl:DatatypeProperty

rdfs:label

fallback value

References
as rdfs:subClassOf (variable:Fact variable, variable:Fact variable)