High Quality Content by WIKIPEDIA articles! xPL is an open protocol intended to permit the control and monitoring of home automation devices. The primary design goal of xPL is to provide a rich set of features and functionality, whilst maintaining an elegant, uncomplicated message structure. The protocol includes complete discovery and auto-configuration capabilities which support a fully "plug-n-play" architecture - essential to ensure a good end-user experience. xPL benefits from a strongly-specified message structure, required to ensure that xPL-enabled devices from different vendors are able to communicate without the risk of incompatibilities. Applications add functionality to your home automation solution such as weather information, sun rise/set and so on. You can build you own and there are many available on the net.