QUALITY OF DATA MODEL SCHEMES. PRINCIPLE OF DATA MODEL COMPACTNESS AND HIS APPLICATIONS. I I
In the second part of this article is demonstrated to what results the application of the compactness principle to the modeling of complex entity types as signs are led. The origin of the one-toone relationship is explained. The subset of typed structural category is entered and the classification systems that enable to make the choice of the suitable structure are designed. The structured schemes that are formed the reference cores of the complex entity types are shown. The implied integrity constraint that is due to the organization structural cluster core is formulated. The formal definition of complex entity type is entered. This definition is enabled to define the quantitative and structural compound of the subtypes of the core.