A.57 library(url): Analysing and constructing URL
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Availability::- use_module(library(url)).(can be autoloaded)
Sourcehttp_location(?Parts, ?Location)
Construct or analyze an HTTP location. This is similar to parse_url/2, but only deals with the location part of an HTTP URL. That is, the path, search and fragment specifiers. In the HTTP protocol, the first line of a message is 
<Action> <Location> HTTP/<version>
Location Atom or list of character codes.