About: http://webisa.webdatacommons.org/69000779

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	So in answer to your question, yes, they are sometimes updated, and there is nothing you need to do other than occasionally update match by adding new music, or manually from the menu, and then check your smart playlist.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com