A method for delivering data in a digital transmitter including generating service layer signaling (SLS) information comprising information for discovery and acquisition of at least one content component: generating service list table (SLT) information including bootstrap information for acquiring the SLS information; encapsulating the at least one content component, the SLS information and the SLT information via UDP/IP; and transmitting a broadcast signal comprising the at least one content component, the SLS information and the SLT information.