About: http://webisa.webdatacommons.org/91514381

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	PCF files can include both CAD files (Solid Edge, DXF, DWG, STL, DGN, ME10, X_T, and Unigraphics, for example) and non-CAD documents such as Microsoft Office and PDF files.
http://www.w3.org/ns/prov#wasQuotedFrom	cadalyst.com