Transmitter system and transmitting method, receiver system and receiving method and transmission media

A computer readable medium storing a computer program for transmitting program related information relating to program information, said computer program when executed performs a method comprising the steps of:

• generating said program related information and layout information relating to displaying said program related information;
• and
• transmitting said program related information and said layout information separately;
• said generating step composing said program related information and said layout information, wherein said program related information and said layout information are each divided into a first part and a plurality of second parts, wherein each first part includes identification information for identifying the program related information or the display related layout information, and wherein the plurality of second parts are each composed of label data for identifying a type of block data, size data, and the block data, wherein each of the plurality of second parts is further divided into a third part composed of identification information for identifying a type of second block data and second size data and a plurality of fourth parts composed the second block data;
• wherein said layout information includes information for initiating an operation in response to selection of a displayed item;
• and
• wherein the displaying of said program related information includes partitioning a display space according to a hierarchical structure having at least three levels, a main page level, a box level and a cell level, wherein main pages are linked to boxes via main-box link information and boxes are linked to cells via box-cell link information;
• and
• wherein each main page is associated with a main layout tag that includes a display position for said page and an ID of a box composing the page, each box is associated with a box layout tag that includes a display position for said box and an ID of a cell composing the box, and each cell is associated with a cell layout tag that includes an ID of a data format of the cell, a display position of the cell, and one or more IDs of information related to the cell.