The mentioning relational database system term has become a synonymous to
database system, but the monopoly of big companies that work in database systems field
has become an obsession for persons who work in this field, because of the high costs o
f
this systems. For this reason the concerns turn towards the advanced technique : the native
XML database systems which are free or most of them are open source systems because of
the increasing dependency on XML files and particularly in transporting data between
different applications and the availability of collections of related files. This has
summoned towards a system to manage and organize them, for this reason the NXDs
appeared. The aim of this study is making a comparison between the capabilities of
RDBMS and NXDs in accordance to multiple standards , investing these two techniques
in practical application , make the relevant tests which reflect the use of these techniques
on the suggested application , display the results and give future suggestions.
This paper aims to study the Conceptual Tools used in Conceptual Modeling
of Database, so that Benefit of Extending these Tool used in Effective Relational
Database Design could be found out.
In this study, we investigated two application examples
, through which two
Conceptual diagrams were used to build Relational Database.
The main result of this study was, the benefit from the extending the
Conceptual Tools for designing a Relational Database could be achieved when
this extension to Tools used in building is applicable to the Database. Since the
Conceptual Modeling stage of the Database, has to be simple and clear, the
extension is not recommended for modeling Conceptual diagrams of large
systems, which has time limits.
