json_check/3

Documentation
- Reference manual
- Packages
  - SWI-Prolog JSON library
    - Supporting JSON
      - library(json_schema): JSON Schema reader and validator
        
        Predicates
        
        json_validate/3
        
        json_compile_schema/3
        
        json_check/3

Availability::- use_module(library(json_schema)).(can be autoloaded)

[semidet]json_check(+Spec, ?JSON, +Options)

Validate a JSON object. Spec is a Prolog representation of the schema that is optimized for validation. This representation is derived from JSON data using json_compile_schema/3. Options:

on_error(Mode)

What to do if an error is found. Defined modes are

error: Raise an exception. This is the default. Note that only the first error is reported this way.
warning: Print a message
silent: Fail

value_string_as(Type)

Same as for json_read/3.

This predicate is often used through validate_json_dict/3, which mantains a cached mapping from the JSON Schema to Spec.