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View Concept

The specification of systems in the automobile industry occurs as a rule from different perspectives. Whereas the automobile manufacturer usually only has to specify their demands, outside suppliers are faced with several perspectives on one and the same parameter.

To take this problem into account, a View Concept was developed for the MSR SYS DTD. Typically there are three views for each database. These are:
Requirements view 

This is the typical view of a automotive manufacturer in which he specifies his requirements on the corresponding system.

Design view 

Mostly the view of a supplier in which he specifies how he meets the requirements in the requirements view.

Design view 

This is the internal view e.g. of a automotive supplier. The suppliers design specification is more strictly than it is required within the requirements and product specification.

The requirements and product specification views are thoroughly separate from each other, i.e. entirely different component structures and specifications data could appear in both views, while the design view, in addition to the other two, only exists at the parameter level.
Figure 2: View concept

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Within the MSRSYS DTD any view, e.g. requirements and product specifications views, can be defined at the top level. This way all perspectives can be shown for one project version within one instance of interchange DTD.

For automobile manufacturers, it is common to have several outside suppliers specify and/or produce systems (second source supplier). DTD permits the exchange of data between any number of partners, however, the exchange of data between only two project partners is recommended (for reasons of legal data protection). For larger document instances it is advisable to describe each view in a separated document instance. Of course, automobile manufacturers must take these circumstances (several product specification views) into consideration in their data storage concept.