Delphi и Model Driven Architecture. Database Application Development is a book on Delphi's database application development technology based on the concept of Model Driven Architecture (MDA). The reader will get acquainted with the ideology of MDA as a whole, master the basic foundations of the UML language, get acquainted with the powerful and laconic dialect of the OCL language, thanks to which it is much easier and faster to solve data access problems than in traditional development using SQL queries. The book describes in detail, with an analysis of many specific examples, practical steps for creating MDA applications in Delphi. The reader will see in practice how quickly and easily it is possible to create complex applications that work with almost any DBMS, while often not using SQL at all and in some cases not even resorting to writing program code.