43. A method of indexing and searching timed media files, as recited in claim 42 , wherein said calculation of at least one relevance interval for a given information representation includes the expansion of relevance intervals based on logical structure cues.
44. A method of indexing and searching timed media files, as recited in claim 43 , wherein said expansion of relevance intervals based on logical structure cues includes expansion to include information that is required to understand the context of the said information representation.