A.32 library(prolog_xref): Cross-reference data collection library
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Availability::- use_module(library(prolog_xref)).(can be autoloaded)
Sourcexref_built_in(?Callable)
True if Callable is a built-in predicate. Currently this is assumed for all predicates defined in the system module and having the property built_in. Built-in predicates are not registered as `called'.