About: http://webisa.webdatacommons.org/341347040

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	In terms of AutoCAD, reactors refer to the set of optional functions that run when events occur such as adding a new item to the drawing database, starting a command, ending a command and so forth.
http://www.w3.org/ns/prov#wasQuotedFrom	cadalyst.com