Access to QWF services is available through the Persistent Publish/Subscribe (PPS) service, a simple filesystem-based facility that provides persistence across reboots. Small and extensible, PPS allows interfacing from almost any higher-level language that can support open, read, write, and close operations on files.
This section summarizes the groups of related PPS objects used by the QWF runtime modules. These object groups provide controls to functional areas such as cellular modem management and audio services. For an in-depth description of the various PPS objects used by QWF, see the QWF PPS Objects Reference. For information about the PPS service, see the Persistent Publish/Subscribe Developer's Guide.