这是 Qt 的主要名称空间的列表。
| Phonon | Contains classes and functions for multimedia applications |
| Phonon::BackendCapabilities | Contains functions to describe the capabilities of the multimedia backend |
| QAudio | 包含用于音频类的枚举 |
| QDBus | Contains miscellaneous identifiers used throughout the QtDBus library |
| QGL | Specifies miscellaneous identifiers used in the Qt OpenGL module |
| QSql | Contains miscellaneous identifiers used throughout the Qt SQL library |
| QSsl | Declares enums common to all SSL classes in QtNetwork |
| QTest | Contains all the functions and declarations that are related to the QTestLib tool |
| Qt | 包含用于整个 Qt 库的其它标识符 |
| QtConcurrent | 使之无需使用低级线程原语就能编写多线程程序的高级 API |
