About: http://webisa.webdatacommons.org/254673649

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	SGML and XML are metalanguages - languages for describing other languages - which let users design their own customized markup languages for limitless different types of documents.
http://www.w3.org/ns/prov#wasQuotedFrom	isgmlug.org