About: http://webisa.webdatacommons.org/220286482

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, PSGI is an interface and Plack is an API and tools around it, that you can actually run your server or application on.
http://www.w3.org/ns/prov#wasQuotedFrom	typepad.com