Editing Universal Plug and Play (section)

===Description===
After a control point has discovered a device, the control point still knows very little about the device. For the control point to learn more about the device and its capabilities, or to interact with the device, the control point must retrieve the device's description from the location ([[URL]]) provided by the device in the discovery message. The UPnP Device Description is expressed in [[XML]] and includes vendor-specific manufacturer information like the model name and number, [[serial number]], manufacturer name, (presentation) URLs to vendor-specific web sites, etc. The description also includes a list of any embedded services. For each service, the Device Description document lists the URLs for control, eventing and service description. Each service description includes a list of the [[Command (computing)|commands]], or ''actions'', to which the service responds, and parameters, or ''arguments'', for each action; the description for a service also includes a list of [[Variable (programming)|variables]]; these variables model the state of the service at [[Run time (program lifecycle phase)|run time]] and are described in terms of their data type, range, and event characteristics.