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Searching for authors named "Alkis Simitsis" – sorted by Relevance.

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  • Modeling and managing ETL Processes  
  • by Alkis Simitsis — 2003 — In: VLDB PhD Workshop
  • …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. The design, development and deployment of ETL processes, which is currently, performed in an ad-hoc, i…
  • Cited by 3 (0 self) – Add To MetaCart
  • Optimizing ETL Processes in Data Warehouses  
  • by Alkis Simitsis — 2005 — In Proc. ICDE
  • …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. Usually, these processes must be completed in a certain time window; thus, it is necessary to optimize…
  • Cited by 7 (1 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
  • DBMSs Should Talk Back Too  
  • by Yannis Ioannidis, Alkis Simitsis
  • …Natural language user interfaces to database systems have been studied for several decades now. They have mainly focused on parsing and interpreting natural language queries to generate them in a formal database language. We envision the reverse functionality, where the system would be able to take …
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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 ETL activities as graphs  
  • by Panos Vassiliadis, Alkis Simitsis, Spiros Skiadopoulos — 2002 — In Proc. 4 th Intl. Workshop on Design and Management of Data Warehouses (DMDW
  • …Abstract. 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 focus on the logical design of the ETL scenario of a data warehouse. Based…
  • Cited by 14 (10 self) – Add To MetaCart
  • A Framework for the Design of ETL Scenarios  
  • by Panos Vassiliadis, Alkis Simitsis, Panos Georgantas, Manolis Terrovitis — 2003 — In Proc. of CAiSE’03
  • …Abstract. 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 delve into the logical design of ETL scenarios. We describe a framework fo…
  • Cited by 10 (6 self) – Add To MetaCart
  • S.: Graph-Based Modeling of ETL Activities with Multi-level Transformations and Updates  
  • by Alkis Simitsis, Panos Vassiliadis, Manolis Terrovitis, Spiros Skiadopoulos — 2005 — In Proceedings of the DaWaK’05 International Conference
  • …Abstract. Extract-Transform-Load (ETL) workflows are data centric workflows responsible for transferring, cleaning, and loading data from their respective sources to the warehouse. Previous research has identified graphbased techniques, in order to construct the blueprints for the structure of such …
  • Cited by 2 (1 self) – Add To MetaCart
  • Multidimensional content exploration  
  • by Alkis Simitsis, Akanksha Baid, Yannis Sismanis, Berthold Reinwald — 2008 — In VLDB
  • …Content Management Systems (CMS) store enterprise data such as insurance claims, insurance policies, legal documents, patent applications, or archival data like in the case of digital libraries. Search over content allows for information retrieval, but does not provide users with great insight into …
  • Cited by 1 (1 self) – Add To MetaCart
  • Conceptual Modeling for ETL Processes  
  • by Panos Vassiliadis, Alkis Simitsis, Spiros Skiadopoulos — 2002
  • …software responsible for the extraction of data from several sources, their cleansing, customization and insertion into a data warehouse. In this paper, we focus on the problem of the definition of ETL activities and provide formal foundations for their conceptual representation. The proposed concep…
  • Cited by 19 (8 self) – Add To MetaCart
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