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Searching for authors named "Panos Vassiliadis" – sorted by Relevance.

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  • Modeling Multidimensional Databases, Cubes and Cube Operations  
  • by Panos Vassiliadis — 1998 — In Proc. of the 10th SSDBM Conference
  • …On-Line Analytical Processing (OLAP) is a trend in database technology, which was recently introduced and has attracted the interest of a lot of research work. OLAP is based on the multidimensional view of data, supported either by multidimensional databases (MOLAP) or relational engines (ROLAP).…
  • Cited by 40 (5 self) – Add To MetaCart
  • Data Warehouse Modeling and Quality Issues  
  • by Panos Vassiliadis — 2000
  • …Data warehouses can be defined as `subject-oriented', integrated, time-varying, non-volatile collections of data that is used primarily in organizational decision making. Nowadays, data warehousing became an important strategy to integrate heterogeneous information sources in organizations, and to…
  • Cited by 14 (1 self) – Add To MetaCart
  • Modelling and optimisation issues for multidimensional databases  
  • by Panos Vassiliadis, Spiros Skiadopoulos — 2000 — In Proc. of CAiSE-2000
  • …On-Line Analytical Processing (OLAP) is a trend in database technology based on the multidimensional view of data. Although multidimensional data cubes form the basic logical data model for OLAP applications, there seems to be no agreement on a common model for cubes. In this paper we propose, a log…
  • Cited by 5 (2 self) – Add To MetaCart
  • Different Perspectives of Metadata for Web-based Information Systems  
  • by Panos Vassiliadis, Yannis Stavrakas
  • …. Metadata can be of extreme value during the lifecycle of a Web-based Information System (i.e. during its design, development, maintenance, and evaluation phases). Metadata can also provide machine understandable information for applications which communicate without human intervention on the WWW. …
  • Cited by 1 (0 self) – Add To MetaCart
  • A Methodology for the Conceptual Modeling of ETL Processes  
  • by Alkis Simitsis, Panos Vassiliadis — 2002 — In Proc. of DSE’03
  • …Extraction-Transformation-Loading (ETL) tools are pieces of software responsible for the extraction of data from several sources, their cleansing, customization and insertion into a data warehouse. In this paper, we propose a methodology for the earliest stages of the data warehouse design, with the…
  • Cited by 4 (2 self) – Add To MetaCart
  • A Survey of Logical Models for OLAP Databases  
  • by Panos Vassiliadis, Timos Sellis — 1999 — SIGMOD Record
  • …Abstract. In this paper, we present different proposals for multidimensional data cubes, which are the basic logical model for OLAP applications. We have grouped the work in the field in two categories: commercial tools (presented along with terminology and standards) and academic efforts. We furthe…
  • Cited by 54 (4 self) – Add To MetaCart
  • On the Logical Modeling of ETL Processes  
  • by Panos Vassiliadis Alkis, Panos Vassiliadis, Alkis Simitsis, Spiros Skiadopoulos — 2002 — In International Conference on Advanced Information Systems Engineering (CAiSE
  • …this paper, we present a logical model for ETL processes. The proposed model is characterized by several templates, representing frequently used ETL activities along with their semantics and their interconnection. In the full version of the paper [4] we present more details on the aforementioned iss…
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  • Quality-Oriented Optimization of the Design of the Global Data Warehouse  
  • by Panos Vassiliadis, Spyros Ligoudistianos, Timos Sellis, Dimitri Theodoratos
  • …Decisionanalysts require fromdatawarehouse syste ms toprovide thehighest level of data andservicequality. TheDataStagingArea (DS A) is the central layer of thedata warehousearchitecture that integratesdata fromth edifferent enterprisesources. The DSAcanbe seenas set aof materializedviews defi nedove…
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  • On the Logical Modeling of ETL Processes  
  • by Panos Vassiliadis, Alkis Simitsis, Spiros Skiadopoulos — 2002 — In International Conference on Advanced Information Systems Engineering (CAiSE
  • …Extraction-Transformation-Loading (ETL) tools are pieces of software responsible for the extraction of data from several sources, their cleansing, customization and insertion into a data warehouse. Research has only recently dealt with the above problem and provided few models, tools and techniques …
  • Cited by 5 (2 self) – Add To MetaCart
  • Modeling and storing context-aware preferences  
  • by Kostas Stefanidis, Evaggelia Pitoura, Panos Vassiliadis — 2006 — In ADBIS
  • …Abstract. Today, the overwhelming volume of information that is available to an increasingly wider spectrum of users creates the need for personalization. In this paper, we consider a database system that supports context-aware preference queries, that is, preference queries whose result depends on …
  • Cited by 1 (1 self) – Add To MetaCart
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