642 - Differentiate between conceptual and logical models, in terms of the level of detail, constraints, and range of information included

Concepts

• [DA4-2] Conceptual models
  Within an initial phase of database design, a conceptual data model is created as a technology-independent specification of the data to be stored within a database.
• [DA4-3] Logical models
  A logical data model expresses the meaning context of a conceptual data model, and adds to that detail about data (base) structures, e.g. using topologically-organized records, relational tables, object-oriented classes, or extensible markup language (XML) construct tags