So as a developer who wants to use MPEG-7 to describe multimedia content, you must have a deeply understanding about MPEG-7 DDL and MPEG-7 MDS.

• 本文针对图象描述的特殊需求，参考MPEG-7对图象的描述，建立了通用的图象描述工具CDTI和图象描述模式。