Object definition diagram and its conversion to object definition language and relational model
Zhiguo Wang · Journal of Zhengzhou Institute of Light Industry · 2003
According to the theory of object definition language(ODL),object definition diagram or ODD,a pictorial tool,which is used to create object-oriented database model,is created(ODD).ODD has a good visualization and is easy to design object-oriented data model.Hence,ODD can be used to model databases conveniently and ODD models can be easily converted to ODL models and relational models.