| (*) extended semantics: objects modeled as world objects rather than as a set of polygons; composite objects possible; |
| (*) objects have generic VRML descriptions; |
| (*) boundaries of the world perceived by a user are not correlated with the way this world is described in the database; |
| (*) world descriptions distributable; |
| (*) objects behavior stored as scripting language; |
| (*) database model not coupled to current VRML definition |
| Advantages of Object-Oriented Model |
| (+) ability to select only the relevant information; |
| (+) multiple world views; |
| (+) incremental world delivery to the browser; |
| (+) world objects dynamic; |
| (+) ability to introduce users to the world; |
| (+) ability to support multiversioning |
