The use of schemas makes an XML-based application more reliable, since they contribute to avoid failures by defining the specific format for the data that the application manipulates. In practice, when an application evolves, new requirements for the data may be established, raising the need of schema evolution. In some cases the generation of a schema is necessary, if such schema does not exis...

A practitioner’s approach to integrate databases and evolve them so as to support new database applications is presented. The approach consists of a joint bottom-up and top-down methodology; the bottom-up approach is taken to integrate existing database using standard schema integration techniques(B-Schema), the top-down approach is used to develop a database schema for the new applications(T-S...

An increasing number of structured knowledge bases have become available on the Web, enabling many new forms of analyses and applications. However, the fact that the data is being published by different parties with different vocabularies and ontologies means that there is a high level of heterogeneity and no common schema. This paper presents Klint, a web-based system that automatically create...

Schema mapping is a challenging problem. It has come to the fore in recent years; there are important applications like database schema integration and, more recently, digital library (DL) merging of heterogeneous data. With Schema Mapper we demonstrate a semi-automatic tool for schema integration that combines a novel visual interface with an algorithm-based recommendation engine. We use ETANA...

The dominant theory of analogical thinking since the 1980s is structure mapping theory. In this paper, a new about reasoning by analogy presented: category assignment It argued that able to explain better than first how specific type analogies are interpreted and evaluated, namely, those in which facts compared constitute examples schema-governed category. arguments presented accompanied brief ...

This paper shows how Information Extraction and Semantic Web Ontology technologies can be combined with information integration techniques in the AutoMed framework to extend the facilities provided by databases for handling free text data. This paper gives a design for a demonstrator system ESTEST (Experimental Software to Extract Structure from Text). This design has several novel features. In...

‎A universal schema for diagonalization was popularized by N.S‎. ‎Yanofsky (2003)‎, ‎based on a pioneering work of F.W‎. ‎Lawvere (1969)‎, ‎in which the existence of a (diagonolized-out and contradictory) object implies the existence of a fixed-point for a certain function‎. ‎It was shown that many self-referential paradoxes and diagonally proved theorems can fit in that schema‎. ‎Here‎, ‎we fi...

A user-defined function (UDF) is a powerful database feature that allows users to customize database functionality. Though useful, present UDFs have numerous limitations, including install-time specification of input and output schema and poor ability to parallelize execution. We present a new approach to implementing a UDF, which we call SQL/MapReduce (SQL/MR), that overcomes many of these lim...

MPEG-7 is a promising standard for the description of multimedia content. A number of applications based on MPEG-7 media descriptions have been set up for research, commercial and industrial applications. Therefore, an efficient storage solution for large amounts of MPEG-7 descriptions is certainly desirable. As a kind of data-centric XML documents, MPEG-7 descriptions can be stored in the rela...