SWI-Prolog -- prolog_to

Documentation
- Reference manual
- Packages
  - SWI-Prolog HTTP support
    - Supporting JSON
      - library(http/json_convert): Convert between JSON terms and Prolog application terms
        
        current_json_object/3
        
        json_object/1
        
        prolog_to_json/2
        
        json_to_prolog/2

Availability::- use_module(library(http/json_convert)).

[det]prolog_to_json(:Term, -JSONObject)

Translate a Prolog application Term into a JSON object term. This transformation is based on :- json_object/1 declarations. If a json_object/1 declaration declares a field of type boolean, commonly used thruth-values in Prolog are converted to JSON booleans. Boolean translation accepts one of true, on, 1, @true, false, fail, off or 0, @false.

Errors: - type_error(json_term, X)
- instantiation_error