Comparison of relational database schema and XML structures

The work deals with the relationship of the relational model and XML schema document and its technological and pragmatic aspects. It defines the theoretical field of data modeling at conceptual level and the two mentioned possible implementation models at the physical level. The aim is to answer the question when in the design and development of application or system it is appropriate to proceed with one of these models. Furthermore, this work also provides a general procedure for mapping conceptual schema into XML schema structures and solutions to problems that can come across during the mapping process. The problem is solved by analyzing two real issues - timetables of public transportation and the information system of a swimming school, formalized through a mechanism of predicate logic. Unlike most works on a similar topic this one varies in a pragmatic view on the problem - the concept of data, their origin, their target user and structuring