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The management of changing types in an object-oriented database

... KB We examine the problem of type evolution in an object-oriented database environment. Type definitions are persistent objects in the database and as such may be modified and shared. The effects of changing ...

Publication - cat - 06/15/2023 - 14:51 - 0 comments - 1 attachment

Schema Evolution in Heterogeneous Database Architectures, A Schema Transformation Approach

... integration and schema evolution into one framework. In previous work we have developed a general framework to support schema transformation and integration in heterogeneous database architectures. Here we show how this framework also ...

Publication - cat - 09/13/2022 - 17:45 - 0 comments - 0 attachments

Schema evolution in object databases by catalogs

... We are concerned by schema evolution in Object Oriented Databases (OODB) that is processed by a modification on the ... a new categorization of the different modifications in three categories : primitive, composite and complexe modifications. On ...

Publication - cat - 07/03/2022 - 23:42 - 0 comments - 0 attachments

An Architecture for Managing Database Evolution

... and extension) are available. The strategy of evolution in which our architecture is based is that of lsquoforward database ... down to the logical schema and to the extension. In order to put into practice this strategy, each component of a database is ... a translation information system is considered in order to manage the translation of conceptual elements into logical schema ...

Publication - cat - 04/17/2013 - 13:27 - 0 comments - 1 attachment

On Schema Evolution in Multidimensional Databases

... on a logical level (e.g. OLAP systems) are often used in data warehouse environments. The user requirements in these dynamic application areas are subject to frequent changes. This ...

Publication - cat - 04/17/2013 - 12:49 - 0 comments - 1 attachment

The CVS Algorithm for View Synchronization in Evolvable Large-Scale Information Systems

... Current view technology supports only static views in the sense that views become undefined and hence obsolete as soon as the ... view definitions to be dynamically evolved to keep them in synch with evolving ISs. We present in this paper a general strategy for the ...

Publication - cat - 04/17/2013 - 12:27 - 0 comments - 1 attachment

Data Reverse Engineering using System Dependency Graphs

... with the use of program understanding methods and tools. In this paper, we focus on the program slicing technique and we show how it can ...

Publication - acleve - 04/17/2013 - 12:05 - 0 comments - 0 attachments

Linking the Gene Ontology to other biomedical ontologies

... n/a The entities described in the Gene Ontology, (i.e., molecular functions, cellular components and biological processes), often make reference (in their names) to other entities, either from GO or from other ontologies, ...

Publication - hartung - 04/17/2013 - 12:05 - 0 comments - 0 attachments

Co-transformations in Database Applications Evolution

... Generative and Transformational Techniques in Software Engineering, Lecture Notes in Computer Science 4143, 2006 URL:  ...

Publication - acleve - 04/17/2013 - 11:38 - 0 comments - 1 attachment

Semi-automatic model integration using matching transformations and weaving models

... heart of model driven engineering (MDE) and can be used in many different application scenarios. For instance, model transformations ... that automates the development of model transformations. In this paper we propose a novel approach that uses matching transformations ...

Publication - huliganka - 04/17/2013 - 11:16 - 0 comments - 1 attachment

Evolution Support in Large-Scale Interoperable Systems: a Metadata Driven Approach

... cost and effort required for maintaining the federation in a consistent state after its launch. If only human intervention is to be ... of change at both local and federal conceptual levels in interoperating database systems. The basis for the model is the exploitation ...

Publication - cat - 04/17/2013 - 10:05 - 0 comments - 0 attachments

Schema Transformation Techniques for Database Reverse Engineering

... DBRE is proposed as a two-phase process consisting in recovering the DBMSdependent data structures (data structure extraction) then in recovering their semantics (data structure conceptualization). The second ...

Publication - cat - 04/17/2013 - 09:38 - 0 comments - 1 attachment

Collaborative and Usage-driven Evolution of Personal Ontologies

... science literature, Amazon product taxonomy, etc.). As in heterogenous communities users typically will use different parts of such ... between own preferences and the one of other people. In this paper we adapt a collaborative filtering recommender system to assist ...

Publication - erhard - 04/17/2013 - 09:27 - 0 comments - 0 attachments

How to version schemas

... and schema objects is badly needed by us all, especially in complex, multi-enterprise development situations. This paper describes how ... and schema development are essentially synonymous, in that the applicable techniques and requisite technology are the same for ...

Publication - cat - 04/17/2013 - 08:16 - 0 comments - 0 attachments

A model for schema evolution in temporal relational databases

... CompEuro93; Computers in Design URL:  ... transaction time and valid time are added to the data. In this context, the modification of the schema which a database management ...

Publication - cat - 04/17/2013 - 06:49 - 0 comments - 0 attachments

Database Schema Evolution through the Specification and Maintenance of Changes on Entities and Relationships

... database system needs to support changes to its schema in order to facilitate the requirements of new applications and to support interoperability within a multidatabase system. In this paper, we present an approach to schema evolution through changes to ...

Publication - erhard - 04/17/2013 - 05:16 - 0 comments - 0 attachments

Evaluation of ontology merging tools in bioinformatics

... 210.74 KB Ontologies are being used nowadays in many areas, including bioinformatics. One of the issues in ontology research is the aligning and merging of ontologies. Tools have ...

Publication - cat - 04/16/2013 - 21:38 - 0 comments - 1 attachment

Semantic Web Complex Ontology Mapping

... semantic relations. Ontology mapping faces new challenges in the context of Semantic Web, especially concerning heterogeneity, dynamics, ... are being validated. MAFRA Toolkit is being applied in the European project Harmonise, which aims to provide solutions for (semi-) ...

Publication - admin - 04/16/2013 - 19:27 - 0 comments - 1 attachment

Understanding class evolution in object-oriented software

... 10 - 49 In the context of object-oriented design, software systems model real-world entities abstractly represented in the system classes. As the system evolves through its lifecycle, its class ...

Publication - cat - 04/16/2013 - 09:27 - 0 comments - 0 attachments

Evolution of XML-based mediation queries in a data integration system

... Proc. 3rd ER-Workshop Evolution and Change in Data Management (ECDM 2004), LNCS 3289 ... 1 - 9 One of the main challenges in data integration systems is the maintenance of the mappings between the ...

Publication - cat - 04/16/2013 - 08:49 - 0 comments - 0 attachments

Aligning representations of anatomy using lexical and structural methods

... inference is discussed. (Conference, no paper type, OA in the Life Sciences) ...

Publication - hartung - 04/16/2013 - 08:05 - 0 comments - 0 attachments

An Algebraic Framework for Merging Incomplete and Inconsistent Views

... merging, also called view integration, is a key problem in conceptual modeling. Large models are often constructed and accessed by ... sources and to the merge assumptions related to them. In this paper, we present a framework for merging incomplete and inconsistent ...

Publication - cat - 04/16/2013 - 07:05 - 0 comments - 0 attachments

Unified Class Evolution by Object-Oriented Views

... development. On the schema level, a firm restriction in this evolution is that it can only be done by evolving class hierarchies ... subclassing. We show a unified approach to class evolution in object-oriented databases, where class hierarchies are allowed to grow in ...

Publication - cat - 04/16/2013 - 05:27 - 0 comments - 0 attachments

Ontology Evolution as Reconfiguration-Design Problem solving

... 50 - 99 In this paper we present an approach to model ontology evolution as ... by a set of rules defining ontology consistency. In this way we allow a user to specify an arbitrary request declaratively and ...

Publication - cat - 04/16/2013 - 05:05 - 0 comments - 0 attachments

A Randomized Approach for the Incremental Design of an Evolving Data Warehouse

... views that determine its schema and its content in terms of the schema and the content of the data sources. DW applications ... against the cost of maintaining the materialized views. In an evolving DW application, new queries need to be answered by the DW. An ...

Publication - cat - 04/16/2013 - 04:49 - 0 comments - 1 attachment