13. A digital television receiver that receives non-real time (NRT) content, comprising in combination: an Internet protocol (IP) receiver that receives a stream of IP packets and selects an IP subnet containing a packet stream selected as an output packet stream; the output packet stream containing non-real time content, a FLUTE file description table (FDT) and NRT metadata; an electronic storage medium; a demultiplexer that demultiplexes the IP packet stream to produce: NRT content that is stored in the electronic storage medium, the FLUTE FDT, and NRT metadata; an FDT parser that parses the FDT to produce NRT file metadata from the FLUTE FDT; and an NRT metadata parser that produces NRT service metadata and NRT content metadata; where the NRT metadata is stored in an NRT-IT table that has a content ID that indexes table entries in the FLUTE FDT.
13. A digital television receiver that receives non-real time (NRT) content, comprising in combination: an Internet protocol (IP) receiver that receives a stream of IP packets and selects an IP subnet containing a packet stream selected as an output packet stream; the output packet stream containing non-real time content, a FLUTE file description table (FDT) and NRT metadata; an electronic storage medium; a demultiplexer that demultiplexes the IP packet stream to produce: NRT content that is stored in the electronic storage medium, the FLUTE FDT, and NRT metadata; an FDT parser that parses the FDT to produce NRT file metadata from the FLUTE FDT; and an NRT metadata parser that produces NRT service metadata and NRT content metadata; where the NRT metadata is stored in an NRT-IT table that has a content ID that indexes table entries in the FLUTE FDT. 16. The NRT receiver according to claim 13 , wherein the NRT content description text is received in a Text Fragment Table (TFT).