8.1 library(http/json): Reading and writing JSON serialization
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Availability::- use_module(library(http/json)).
Source[semidet]is_json_term(@Term)
[semidet]is_json_term(@Term, +Options)
True if Term is a json term. Options are the same as for json_read/2, defining the Prolog representation for the JSON true, false and null constants.