About: http://webisa.webdatacommons.org/410527482

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	If the argument is a pointer to a msghdr structure, this macro shall return a pointer to the first cmsghdr structure
http://www.w3.org/ns/prov#wasQuotedFrom	opengroup.org