[[File:UDOM_TransitionMetaModel.png|thumb|220px|alt=Transition plant picture|Transition from plant picture into data model]]
The transition from the plant picture into an object- / data - model logically happens via an intermediate layer and finally leads to our first definition
{{UMM|A descriptive model, where objects provide information about the aspects of the data, is also called “Metamodel”.}}
[[File:UDOM_PlantPartRelations.png|thumb|220px|alt=Relations of plant parts|Possible relations between parts of plant]]
An important aspect of the datamodel has not been discussed yet, namely <b>how are the blocks (=MetaClasses) related to each other?</b>
== Relating objects ==