A method for fabricating a MOS transistor is disclosed. One embodiment includes abstracting a set of configuration information associated with a first environment into a set of environment independent attributes and a set of environment dependent attributes. The members of the seed train are positioned within the lumen such that each accommodation slot is in registration with a space between contiguous members of the seed train. Thus, by replacing only blocks, various types of digital television broadcasts that differ in carrier waves, modulating systems, and compressing systems can be handled.