About: http://webisa.webdatacommons.org/133079575

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	You have a base widget class that supports abstract methods for the ways a user might interact with a widget then a button is a kind of widget, a check box could be a kind of button, and so forth.
http://www.w3.org/ns/prov#wasQuotedFrom	gamedev.net