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Predicate uri_components/2
Availability::- use_module(library(uri)).(can be autoloaded)
Source[det]uri_components(+URI, -Components)
[det]uri_components(-URI, +Components)
Break a URI into its 5 basic components according to the RFC-3986 regular expression: 
^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?
 12            3  4          5       6  7        8 9

If the schema is urn, it is broken into its schema, NSI (Namespace Identifier) and NSS (Namespace Specific String).

Components is a one of
uri_components(Scheme, Authority, Path, Search, Fragment)
If a URI is parsed, i.e., using mode (+,-), components that are not found are left uninstantiated (variable). See uri_data/3 for accessing this structure.
urn_components(Scheme, NID, NSS, Search, Fragment)
Here Scheme is always urn. Otherwise the same comments as for uri_components/5 apply.

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LogicalCaptain said (2021-03-06T10:33:12):0 upvotes 0 0 downvotes
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Example:

?- use_module(library(uri)).

?- uri_components('https://www.example.com/snoopy/the/dog?location=doghouse',Components).
Components =
   uri_components(
      https,
      'www.example.com',
      '/snoopy/the/dog',
      'location=doghouse',
      _11436).