In exceptional circumstances, ooRexx may deprecate functions or features, which means the use of these functions is discouraged, documentation is no longer provided, and bug reports against deprecated functions will not be accepted. Reasons for deprecation include broken functionality, features that were never officially documented, or functions no longer required.

Although existing code using deprecated functions is expected to continue to work as-is, you are strongly encouraged to migrate to the replacement functionality, as these functions may be removed from future releases of the interpreter.