XML (Extensible Markup Language) is emerging and gradually accepted as the standard for data interchange in the Internet world. Interoperation of relational database and XML database involves schema and data translations. Through EER (extended entity relationship) model can convert the schema of relational database into XML. The semantics of the relational database, captured in EER diagram, are...

In this paper we introduce a fuzzy approach for image retrieval based on color features. Our method deals with two problems related to imprecision: the vagueness in the color description and the representation of fuzzy data in database models. To face the first problem, the concept of dominant fuzzy color is introduced to describe the image, using linguistic labels for representing the color in...

Object-relational database systems are now being deployed for real use by customers. Researchers and industry users have begun to explore the performance issues that these systems raise. In this paper, we examine some of those performance issues, and evaluate them for object-relational systems in general and for INFORMIX-Universal Server in particular. We describe object-relational query proces...

Databases are widely used today, but the study of forensic analysis in database environments has not been extensive. The lack of research is due mostly to the complex structure of databases and the scarcity of database forensic tools. This has created a wide range of possibilities for data hiding as a means to hinder data discovery during forensic investigations. This paper describes several te...

As computational power and storage capacity increase, processing and analyzing large volumes of multi-dimensional datasets play an increasingly important role in many domains of scienti c research. Scienti c applications that make use of very large scienti c datasets have several important characteristics: datasets consist of complex data and are usually multi-dimensional; applications usually ...

Since most multimedia database systems are built on top of object or object-relational database systems, they inherit the underlying query facilities. The approach we present in this paper is in two steps. The rst step is to design a multimedia query language that will be used as an internal language. The second step is to deene an equivalent visual query language and a translator to translate ...

Object-relational database management systems allow users to define complex data types, such as objects, collections, and nested tables. Unfortunately, most commercially available database systems do not support either efficient querying or indexing of complex attributes. Different indexing schemes for complex data types have been proposed in the literature so far, most of them being applicatio...

In recent days, the demand for dealing large set of distributed data obsoletes relational database and its structured query language (SQL) solutions in practice paves way novel name non-relational as not-only SQL (NoSQL). The NoSQL offers dynamic, flexible, scalable, highly available, greater performance near real-time access to nature voluminous used current industrial applications. Apart from...

Presently, the area of updating XML is immature since XQuery has not provided update features. Thus this area has not been investigated as fully as it should have been. Moreover existing researches focus on updating native XML database so that everything must be created from scratch. Furthermore, an XML document is often treated as a database by keeping all data in one document, leading invaria...

After the general introduction a short view into today’s component-oriented usage-scenarios of object-relational databases is given and the resulting requirements for reusable object-relational mapping components are stated. Then a clarification of the term "component" is given. Followed by an overview of the UFO-RDB wrapper component and lists and short discussion of the provided features. The...