Several standard modules are included with Trinc-Prolog, these modules contain prolog predicates and prolog classes which can be used in applications and of which the interface will not change. All the standard modules are located in the folder /MODULES/.
| ads | several abstract datastructures are in this module |
| datetime | this module contains predicates for working with dates and times |
| list | the list module contains standard predicates for working with lists |
| db API | all the classes for relational database access |
| Windows API | all the windows classes |
All the standard modules can be easily opened by using the predicate open_standardmodule/2.
There is a special system module called 'system', it contains built-in predicates that are themselves implemented in prolog like once/1 and repeat/0. It is not possible to close the 'system' module and it is not loaded from a file on disk, instead the module is generated during the start of Trinc-Prolog.