About: http://webisa.webdatacommons.org/250530829

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	XML::Twig (mentioned above) is specifically designed for the sort of task you are asking about - setting up a bunch of rules to handle incoming XML features and then streaming some XML through them.
http://www.w3.org/ns/prov#wasQuotedFrom	perlmonks.org