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An information model in software engineering is a representation of concepts and the relationships, constraints, rules, and operations to specify data semantics for a chosen domain of discourse.
Typically it specifies relations between kinds of things, but may also include relations with individual things.
It can provide a sharable, stable, and organized structure of information requirements or knowledge for the domain context.
Information model is usually an abstract, formal representation of entity types that may include their properties, relationships and the operations that can be performed on them.
The entity types in the model may be kinds of real-world objects, such as devices in a network, or occurrences, or they may themselves be abstract, such as for the entities used in a billing system.
Typically, they are used to model a constrained domain that can be described by a closed set of entity types, properties, relationships and operations.
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