| # Introduction The data model is the fourth type of diagram you can model in the Modeler. A data model describes the permanent storage components, and their structures, on multiple abstraction levels. Entity relationship modeling aims to show the meaning and relevance of data for an organization. The main aim of entity relationship modeling is to document the LN application databases. Part of the ERM-module is the Modeler. With this modeler you can edit entity relationship diagrams and graphically represent the data models. You can create a new conceptual database design or document an existing database. The data model supplies information about the physical or logical data model of the package combination to which the enterprise model applies. The data model does not yet influence the configuration of the LN software. The data model is located within the enterprise modeler environment; functionally, it is a subcomponent of the enterprise model. In terms of modeling, the data model is directly created without placing it in a reference or project model, and without using a repository. |