24. The method of claim 23 , wherein each segment element can be a child of only one section element, and wherein each section element can be a child of only one other section element, and further wherein when a child of any of said section elements includes a segment, that section element can only have additional segment elements as children.
23. The method of claim 22 , wherein said section elements are each associated with some corresponding portion of said media contents, and wherein said context description data further includes: another plurality of context attributes each having a value for describing a corresponding context of said media content and each being an attribute associated with one or more of said section elements and including at least one keyword for describing the contents of the corresponding portion described by the associated one or more of said section elements, and another plurality of importance attributes each associated with a corresponding one of said section elements and having a value representing a degree of importance of the portion corresponding to said corresponding section element in relation to one of the another context attributes that is also associated with the corresponding section element.