Abstract: An object-oriented approach is used for data modeling in this paper, The simple object is defined as a named linear list. With the fact that the list can be nested, we define a complex multimedia object to be a nested list. There are three categories of objects involved in NAIMDB i.e. atomic objects, simple objects and complex objects. The simple objects and the descriptions of nested list corresponding to complex objects are actually stored in DB, but complex objects themselves are not stored.

Key words: multimedia data, object-oriented, nested list