http://opencaesar.io/sierra/function#Function
Class function:Function

oml:type

oml:Concept

rdf:type

owl:Class

rdfs:subClassOf

	function:ExchangingElement
	function:Function
	owl:Thing

directDomainOf

	function:hasInput → function:Input
	function:hasOutput → function:Output
	function:hasPin → function:Pin
	function:isPerformedBy → function:PerformingElement