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Data Model Modelling
A data model describes the structure, th conditions and behaviour of data including the semantics.
To describe a data model, it needs a modelling language which can be grafical (e.g. UML) or textual (e.g. GML, INTERLIS).
There exist different levels of data models:
  • conceptual model: describes the data in its structure and conditions in a system independent manner, based on a concept and its semantic of the real world.
  • implementation model: describing the structure in a system dependent language that describes the data how it is implemented in a specific system.