Information Retrieval Systems (IRS) have dramatically changed the ways how people acquire information for their need. Information Retrieval (IR) enables user to find relevant document from collection of countless resources. This article presents an overview of IRS. Objectives of this article is...

In this paper we will try to answer to some questions referring to hypertext. In the same time our purpose is to explain what we mean by a query in the context of XQL, and to present a simple model, which will serve as a framework for the future research.

With the development of client server technology and multilayer architectures the systems ef-ficiency issue has been increasingly discussed. Lacking knowledge in optimization methods and tools offered by DBMS's, database administrators and developers of applications based on Microsoft...

An important percent from information systems use databases and in the majority of cases for developing such systems are used object oriented programming languages. From this point of view a key aspect is represented by the database querying features. The authors has observed a major gap between...

Starting from the need to develop efficient IT systems, we intend to review the optimization methods and tools that can be used by SQL Server database administrators and developers of applications based on Microsoft technology, focusing on the latest version of the proprietary DBMS, SQL Server...