1.7) Model vs. Original Attributes

With the model as a purposeful simplified representation of an original, there will always be omitted attributes of the original. If we could include all attributes we effectively would use the original to solve our problem. On the other hand the model will have a set of abundant attributes which are not part of the original. The model relation describes the relation between the sub sets of attributes which are part of the model as well as the original.

Source: Stachowiak, 1973