prolog-modules

To avoid predicate name collisions in Prolog, use module systems to isolate code. Declare modules with explicit export lists and use qualified calls to maintain isolation in larger codebases.

In SWI-Prolog, declare a module using the module/2 directive, specify your export list within the brackets, and use use_module to import those predicates into other files or libraries selectively.

ISO and SWI Prolog module semantics differ in visibility rules and import behavior. Understanding these distinctions helps prevent common pitfalls when structuring libraries across different Prolog environments.

The use_module directive imports predicates from local files or libraries into your current Prolog module. It respects export lists, ensuring only declared predicates are visible to the importing module.

SWI-Prolog module declarations can apply to SICStus Prolog contexts, but you must verify module visibility rules and meta-predicate requirements to ensure compatibility across both ISO and SWI environments.

Best practices for structuring large Prolog codebases include using explicit exports, qualified calls, and strict module visibility. This prevents predicate collisions and keeps your libraries maintainable.