System Information Model

<b>Purpose</b>: Specify the relationships between and properties of the central information objects in the system that must always be true (invariants)<br/><br/><b>Input</b>: Requirements view<br/><br/><b>Output</b>: UML class diagram, Textual description<br/><br/>The system information model specifies relationships between and properties of information objects that must always be true (invariants). The system information model shall be specified as a traditional information model using UML class diagrams. The system information model defines the information semantics by relating information objects and defining concepts that must be understood in a common way in the system (often referred to as "a shared data model"). <br/>Each class of information objects shall in addition be described with a textual description of its purpose, and a description of each of its public attributes that are of importance at the architectural level.<br/>Related to the Reference Architecture the system information model primarily describes the entities of the business service tier and the user service tier.<br/>