- A multimedia framework to enable transparent and augmented use of multimedia resources.

- Complete multimedia content creation, production, delivery is done with MPEG-21.

- MPEG-21 allows to use the existing multimedia components to be used together.

- The basic architectural concept of MPEG-21 framework is the Digital Item.

- Digital Items are digital objects which includes standard representation and identification of multimedia.

- Digital Item is a combination of resources such as videos, audio tracks, images, metadata and structure that describes the relationship among resources.