A MULTIMEDIA SYSTEM TO PROCESS PROGRAM GUIDELINES AND ASSOCIATED MULTIMEDIA OBJECTS.

摘要

Apparatus for acquiring data from packaged programs from at least one first source, comprising: a processor (62) for acquiring information from program guides and for acquiring auxiliary information transported in hierarchically arranged data tables in said packaged program data, including said auxiliary information; (a) a first version identifier transported in a primary data table and updated in response to a version change in at least one of a plurality of secondary tables hierarchically linked to said primary data table, and (b) a second identifier of version transported in a secondary data table and updated in response to at least one of, a version change in said secondary table, and a version change in a tertiary table hierarchically linked to said secondary table; a processor for determining a change in said secondary data table content, examining said second version identifier for a change that follows the determination of a change in said first version identifier; and an acquisition processor to acquire said secondary data table in response to said change determination.