APIs and system objects

APIs retrieve information from system objects.

Some of the returned information contains special values. For example, the List Objects (QUSLOBJ) API returns the object type as a special value (such as *PGM and *LIB). However, special values might be added in future releases. Even numeric values might have new special values. When you code to APIs, assume that the format of the information returned does not change from release to release, but the content of the information might change.