1. A method, comprising: receiving a triggerable declarative object (TDO) at a digital television receiver device that carries out a programmed script upon execution; the programmed script including a parameter discovery function that determines an operational parameter of the television receiver device and further includes a programmed function; initiating the execution of the TDO in order to initiate execution of the script on a processor of the television receiver device; running the script on the processor of the television receiver device in order to discover the operational parameter and in order to carry out the programmed function; and where the programmed function is conditional upon the discovered operational parameter of the television receiver.