What is the main difference between DIA and MPEG-7?
While content description has been addressed by MPEG-7 (see Question 8), the description of content format and usage environments has not been addressed and it is now the target of MPEG-21 Digital Item Adaptation. With this goal in mind, it is essential to have available not only the description of the content but also a description of its format and of the usage environment in order that content adaptation may be performed to provide the User the best content experience for the content requested with the conditions available.