Availability::- use_module(library(uri)).(can be autoloaded) 
 [semidet]uri_file_name(+URI, 
-FileName)
[det]uri_file_name(-URI, 
+FileName)Convert between a URI and a local file_name. This protocol is 
covered by RFC 1738. Please note that file-URIs use absolute 
paths. The mode (-, +) translates a possible relative path into an 
absolute one.
[semidet]uri_file_name(+URI, 
-FileName)
[det]uri_file_name(-URI, 
+FileName)Convert between a URI and a local file_name. This protocol is 
covered by RFC 1738. Please note that file-URIs use absolute 
paths. The mode (-, +) translates a possible relative path into an 
absolute one.