Il-Yeol Song

A survey on ontology mapping

Ontology is increasingly seen as a key factor for enabling interoperability across heterogeneous systems and semantic web applications. Ontology mapping is required for combining distributed and heterogeneous ontologies. Developing such ontology mapping has been a core issue of recent ontology research. This paper presents ontology mapping categories, describes the characteristics of each category, compares these characteristics, and surveys tools, systems, and related work based on each category of ontology mapping. We believe this paper provides readers with a comprehensive understanding of ontology mapping and points to various research topics about the specific roles of ontology mapping.

Analytics over large-scale multidimensional data: the big data revolution!

In this paper, we provide an overview of state-of-the-art research issues and achievements in the field of analytics over big data, and we extend the discussion to analytics over big multidimensional data as well, by highlighting open problems and actual research trends. Our analytical contribution is finally completed by several novel research directions arising in this field, which plays a leading role in next-generation Data Warehousing and OLAP research.

Conceptual Modeling-ER 2003

The Semantic Web and the Web service paradigm are currently the most important trends on the way to the next generation of the Web. They promise new opportunities for content and service provision, enabling manifold and flexible new applications and improved support for individual and cooperative tasks. The use of the Web service paradigm in the development of Web applications, that typically couple application databases with user dialogs, is quite obvious. The development of Web applications that can be operated effectively in the Semantic Web context (Semantic Web Applications), however, imposes some challenges. Two main challenges towards extended (conceptual) modeling support are addressed in this talk: 1. In the Semantic Web, Web applications move from a purely human user community towards a mixed user community consisting of humans as well as of software agents; this results into new requirements towards models for Web applications’ user interfaces; 2. Automatic interpretation of content, one of the main building blocks of the Semantic Web, is based on interlinking local models with globally defined interpretation schemes like vocabularies and ontologies; this has to be reflected by the conceptual application domain models of Semantic Web Applications. Conceptual Modeling for Web applications, thus, has to be revisited in the context of the new Web trends looking for adequate Semantic Web Application Models. In Web applications dialog-oriented (in most cases form-based) user interface models are state-of-the art for the interaction with users. The requirement of representing interaction with humans as well as with software agents is best met by a user interface model that describes the dialogs with the system on a conceptual level that can be dynamically translated into a (user) interface language adequate for the respective “user” (human or agent). The upcoming Web standard XForms for the next generation of form-based user interfaces is a good example of such a conceptual user interface model. For the linking of globally defined concepts with local domain model concepts one of the most popular models in the context of the Semantic Web is provided by the Resource Description Framework (RDF). The systematic integration of Uniform Resource Identifiers (URIs) into the model facilitates references to vocabularies and ontologies defined e.g. as RDF Schema or OWL ontology. However, for using RDF in Web applications a coupling between these “semantic” data models and the more traditional data models underlying the application data is necessary. I.-Y. Song et al. (Eds.): ER 2003, LNCS 2813, pp. 1–2, 2003. c

Extending the UML for Multidimensional Modeling

Multidimensional (MD) modeling is the foundation of data warehouses, MD databases, and On-Line Analytical Processing (OLAP) applications. In the past few years, there have been some proposals for representing the main MD properties at the conceptual level providing their own notations. In this paper, we present an extension of the Unified Modeling Language (UML), by means of stereotypes, to elegantly represent main structural and dynamic MD properties at the conceptual level. We make use of the Object Constraint Language (OCL) to specify the constraints attached to the defined stereotypes, thereby avoiding an arbitrary use of these stereotypes. The main advantage of our proposal is that it is based on a well-known standard modeling language, thereby designers can avoid learning a new specific notation or language for MD systems. Finally, we show how to use these stereotypes in Rational Rose 2000 for MD modeling.

Integration of association rules and ontologies for semantic query expansion

We propose a novel semantic query expansion technique that combines association rules with ontologies and Natural Language Processing techniques. Our technique is different from others in that (1) it utilizes the explicit semantics as well as other linguistic properties of unstructured text corpus, (2) it makes use of contextual properties of important terms discovered by association rules, and (3) ontology entries are added to the query by disambiguating word senses. Using TREC ad hoc queries we achieve from 13.41% to 32.39% improvement for P@20 and from 8.39% to 14.22% for the F-measure.

Multidimensional Modeling with UML Package Diagrams

The Unified Modeling Language (UML) has become the de facto standard for object-oriented analysis and design, providing different diagrams for modeling different aspects of a system. In this paper, we present the development of multidimensional (MD) models for data warehouses (DW) using UML package diagrams. In this way, when modeling complex and large DW systems, we are not restricted to use flat UML class diagrams. We present design guidelines and illustrate them with various examples. We show that the correct use of the package diagrams using our design guidelines will produce a very simple yet powerful design of MD models. Furthermore, we provide a UML extension by means of stereotypes of the particular package items we use. Finally, we show how to use these stereotypes in Rational Rose 2000 for MD modeling.

Data warehousing and OLAP over big data: current challenges and future research directions

In this paper, we highlight open problems and actual research trends in the field of Data Warehousing and OLAP over Big Data, an emerging term in Data Warehousing and OLAP research. We also derive several novel research directions arising in this field, and put emphasis on possible contributions to be achieved by future research efforts.

Conceptual Modeling for Advanced Application Domains

In this paper a joint topology-geometry model is proposed for dealing with multiple representations and topology management to support map generalization. This model offers a solution for efficiently managing both geometry and topology during the map generalization process. Both geometry-oriented generalization techniques and topology-oriented techniques are integrated within this model. Furthermore, by encoding vertical links in this model, the joint topology-geometry model provides support for hierarchical navigation and browsing across the different levels as well as for the proper reconstruction of maps at intermediate levels.

A coherent graph-based semantic clustering and summarization approach for biomedical literature and a new summarization evaluation method

BackgroundA huge amount of biomedical textual information has been produced and collected in MEDLINE for decades. In order to easily utilize biomedical information in the free text, document clustering and text summarization together are used as a solution for text information overload problem. In this paper, we introduce a coherent graph-based semantic clustering and summarization approach for biomedical literature.ResultsOur extensive experimental results show the approach shows 45% cluster quality improvement and 72% clustering reliability improvement, in terms of misclassification index, over Bisecting K-means as a leading document clustering approach. In addition, our approach provides concise but rich text summary in key concepts and sentences.ConclusionOur coherent biomedical literature clustering and summarization approach that takes advantage of ontology-enriched graphical representations significantly improves the quality of document clusters and understandability of documents through summaries.

Perspectives in Conceptual Modeling

First International Workshop on Best Practices of UML (BP-UML 2005).- Preface to BP-UML 2005.- Experience Reports and new Applications.- Current Practices in the Use of UML.- An Empirical Study of the Nesting Level of Composite States Within UML Statechart Diagrams.- Utilizing a Multimedia UML Framework for an Image Database Application.- Model Evaluation and Requirements Modeling.- Object Class or Association Class? Testing the User Effect on Cardinality Interpretation.- Organizing and Managing Use Cases.- A Comparative Analysis of Use Case Relationships.- Metamodeling and Model Driven Development.- Applying Transformations to Model Driven Development of Web Applications.- A Precise Approach for the Analysis of the UML Models Consistency.- A UML 2 Profile for Business Process Modelling.- Seventh International Bi-conference Workshop on Agent-Oriented Information Systems (AOIS-2005).- Preface to AOIS 2005.- Invited Talk.- Agent Oriented Data Integration.- Positions in Engineering Agent Oriented Systems.- AOSE and Organic Computing - How Can They Benefit from Each Other? Position Paper.- Modeling Dynamic Engineering Design Processes in PSI.- Agent Oriented Methodologies and Conceptual Modeling.- Preliminary Basis for an Ontology-Based Methodological Approach for Multi-agent Systems.- DDEMAS: A Domain Design Technique for Multi-agent Domain Engineering.- An Agent-Oriented Meta-model for Enterprise Modelling.- Agent Communication and Coordination.- An Approach to Broaden the Semantic Coverage of ACL Speech Acts.- Normative Pragmatics for Agent Communication Languages.- Experimental Comparison of Rational Choice Theory, Norm and Rights Based Multi Agent Systems.- Second International Workshop on Conceptual Modeling for Geographic Information Systems (CoMoGIS 2005).- Preface to CoMoGIS 2005.- Invited Talk.- Map Algebra Extended with Functors for Temporal Data.- Spatial and Spatio-temporal Data Representation.- A Formal Model for Representing Point Trajectories in Two-Dimensional Spaces.- A Logical Approach for Modeling Spatio-temporal Objects and Events.- Conceptual Neighbourhood Diagrams for Representing Moving Objects.- Spatial Relations.- A Refined Line-Line Spatial Relationship Model for Spatial Conflict Detection.- Assessing Topological Consistency for Collapse Operation in Generalization of Spatial Databases.- Spatial Relations for Semantic Similarity Measurement.- Spatial Queries, Analysis and Data Mining.- Approximate Continuous K Nearest Neighbor Queries for Continuous Moving Objects with Pre-defined Paths.- Spatio-temporal Similarity Analysis Between Trajectories on Road Networks.- Using Data Mining for Modeling Personalized Maps.- Data Modeling and Visualisation.- 3D Scene Modeling for Activity Detection.- SAMATS - Edge Highlighting and Intersection Rating Explained.- Applying Semantic Web Technologies for Geodata Integration and Visualization.- Sixth International Workshop on Conceptual Modeling Approaches for e-Business (eCOMO 2005).- Preface to eCOMO 2005.- Bargaining in E-Business Systems.- Conceptual Content Management for Enterprise Web Services.- Verifying Web Services Composition.- Towards Amplifying Business Process Reuse.- First International Workshop on Quality of Information Systems (QoIS 2005).- Preface to QoIS 2005.- Information System Models Quality.- Measuring the Perceived Semantic Quality of Information Models.- Situated Support for Choice of Representation for a Semantic Web Application.- Towards Systematic Model Assessment.- A Fuzzy Based Approach to Measure Completeness of an Entity-Relationship Model.- Quality Driven Processes.- Managing Information Quality in e-Science: A Case Study in Proteomics.- Tool Support and Specification Quality: Experimental Validation of an RE-Tool Evaluation Framework.- Improving Object-Oriented Micro Architectural Design Through Knowledge Systematization.- Tutorials.- Tutorial 1: eduWeaver - The Courseware Modeling Tool.- Tutorial 2: FOOM - Functional and Object Oriented Methodology: An Integrated Approach.- Tutorial 3: Domain Engineering - Using Domain Concepts to Guide Software Design.- Tutorial 4: Reasoning About Web Information Systems.- Tutorial 5: Schema and Data Translation.- Tutorial 6: Modeling and Simulation of Dynamic Engineering Design Processes.- Tutorial 7: Modeling Enterprise Applications.