About: http://webisa.webdatacommons.org/328345077

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	Polling is the most common solution; the other is to have your middle-tier handle the notifications to other services when updates are sent through them.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com