About: http://webisa.webdatacommons.org/37927773

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	The payload of the HeartbeatRequest can be chosen by the implementation, for example simple sequence numbers or something more elaborate.
http://www.w3.org/ns/prov#wasQuotedFrom	schneier.com