When you store a value in an IVR slot, the value is also stored as a data source. The Data Connector, Data Announcer, Data Router, ACD, and UCD applets can then use the data source. The name of the data source is the friendly name of the IVR slot, prefixed with 'IVRSlot|'. For example, if an IVR slot has a friendly name of 'StockPrice', the corresponding data source value is called 'IVRSlot|StockPrice'.