The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Stefano Rizzi - One of the best experts on this subject based on the ideXlab platform.
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Designing Web Warehouses from XML Sources
Lecture Notes in Computer Science, 2003Co-Authors: Boris Vrdoljak, Marko Banek, Stefano RizziAbstract:Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semi-structured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semi-automated methodology for designing web warehouses from XML sources modeled by XML Schemas. In the proposed methodology, design is carried out by first creating a Schema graph, then navigating its arcs in order to derive a correct multidimensional representation. Differently from previous approaches in the literature, particular relevance is given to the problem of detecting shared hierarchies and convergence of dependencies, and of modeling many-to-many relationships. The approach is implemented in a prototype that reads an XML Schema and produces in output the Logical Schema of the warehouse.
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DaWaK - Designing Web Warehouses from XML Schemas
Data Warehousing and Knowledge Discovery, 2003Co-Authors: Boris Vrdoljak, Marko Banek, Stefano RizziAbstract:Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semi-structured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semi-automated methodology for designing web warehouses from XML sources modeled by XML Schemas. In the proposed methodology, design is carried out by first creating a Schema graph, then navigating its arcs in order to derive a correct multidimensional representation. Differently from previous approaches in the literature, particular relevance is given to the problem of detecting shared hierarchies and convergence of dependencies, and of modeling many-to-many relationships. The approach is implemented in a prototype that reads an XML Schema and produces in output the Logical Schema of the warehouse.
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Designing web warehouses from XML Schemas
Lecture Notes in Computer Science, 2003Co-Authors: Boris Vrdoljak, Marko Banek, Stefano RizziAbstract:Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semi-structured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semi-automated methodology for designing web warehouses from XML sources modeled by XML Schemas. In the proposed methodology, design is carried out by first creating a Schema graph, then navigating its arcs in order to derive a correct multidimensional representation. Differently from previous approaches in the literature, particular relevance is given to the problem of detecting shared hierarchies and convergence of dependencies, and of modeling many-to-many relationships. The approach is implemented in a prototype that reads an XML Schema and produces in output the Logical Schema of the warehouse.
Boris Vrdoljak - One of the best experts on this subject based on the ideXlab platform.
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Designing Web Warehouses from XML Sources
Lecture Notes in Computer Science, 2003Co-Authors: Boris Vrdoljak, Marko Banek, Stefano RizziAbstract:Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semi-structured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semi-automated methodology for designing web warehouses from XML sources modeled by XML Schemas. In the proposed methodology, design is carried out by first creating a Schema graph, then navigating its arcs in order to derive a correct multidimensional representation. Differently from previous approaches in the literature, particular relevance is given to the problem of detecting shared hierarchies and convergence of dependencies, and of modeling many-to-many relationships. The approach is implemented in a prototype that reads an XML Schema and produces in output the Logical Schema of the warehouse.
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DaWaK - Designing Web Warehouses from XML Schemas
Data Warehousing and Knowledge Discovery, 2003Co-Authors: Boris Vrdoljak, Marko Banek, Stefano RizziAbstract:Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semi-structured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semi-automated methodology for designing web warehouses from XML sources modeled by XML Schemas. In the proposed methodology, design is carried out by first creating a Schema graph, then navigating its arcs in order to derive a correct multidimensional representation. Differently from previous approaches in the literature, particular relevance is given to the problem of detecting shared hierarchies and convergence of dependencies, and of modeling many-to-many relationships. The approach is implemented in a prototype that reads an XML Schema and produces in output the Logical Schema of the warehouse.
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Designing web warehouses from XML Schemas
Lecture Notes in Computer Science, 2003Co-Authors: Boris Vrdoljak, Marko Banek, Stefano RizziAbstract:Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semi-structured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semi-automated methodology for designing web warehouses from XML sources modeled by XML Schemas. In the proposed methodology, design is carried out by first creating a Schema graph, then navigating its arcs in order to derive a correct multidimensional representation. Differently from previous approaches in the literature, particular relevance is given to the problem of detecting shared hierarchies and convergence of dependencies, and of modeling many-to-many relationships. The approach is implemented in a prototype that reads an XML Schema and produces in output the Logical Schema of the warehouse.
Marko Banek - One of the best experts on this subject based on the ideXlab platform.
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Designing Web Warehouses from XML Sources
Lecture Notes in Computer Science, 2003Co-Authors: Boris Vrdoljak, Marko Banek, Stefano RizziAbstract:Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semi-structured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semi-automated methodology for designing web warehouses from XML sources modeled by XML Schemas. In the proposed methodology, design is carried out by first creating a Schema graph, then navigating its arcs in order to derive a correct multidimensional representation. Differently from previous approaches in the literature, particular relevance is given to the problem of detecting shared hierarchies and convergence of dependencies, and of modeling many-to-many relationships. The approach is implemented in a prototype that reads an XML Schema and produces in output the Logical Schema of the warehouse.
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DaWaK - Designing Web Warehouses from XML Schemas
Data Warehousing and Knowledge Discovery, 2003Co-Authors: Boris Vrdoljak, Marko Banek, Stefano RizziAbstract:Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semi-structured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semi-automated methodology for designing web warehouses from XML sources modeled by XML Schemas. In the proposed methodology, design is carried out by first creating a Schema graph, then navigating its arcs in order to derive a correct multidimensional representation. Differently from previous approaches in the literature, particular relevance is given to the problem of detecting shared hierarchies and convergence of dependencies, and of modeling many-to-many relationships. The approach is implemented in a prototype that reads an XML Schema and produces in output the Logical Schema of the warehouse.
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Designing web warehouses from XML Schemas
Lecture Notes in Computer Science, 2003Co-Authors: Boris Vrdoljak, Marko Banek, Stefano RizziAbstract:Web warehousing plays a key role in providing the managers with up-to-date and comprehensive information about their business domain. On the other hand, since XML is now a standard de facto for the exchange of semi-structured data, integrating XML data into web warehouses is a hot topic. In this paper we propose a semi-automated methodology for designing web warehouses from XML sources modeled by XML Schemas. In the proposed methodology, design is carried out by first creating a Schema graph, then navigating its arcs in order to derive a correct multidimensional representation. Differently from previous approaches in the literature, particular relevance is given to the problem of detecting shared hierarchies and convergence of dependencies, and of modeling many-to-many relationships. The approach is implemented in a prototype that reads an XML Schema and produces in output the Logical Schema of the warehouse.
Jose Crespo - One of the best experts on this subject based on the ideXlab platform.
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integration of relational and textual biomedical sources a pilot experiment using a semi automated method for Logical Schema acquisition
Methods of Information in Medicine, 2009Co-Authors: Miguel Garciaremesal, Victo Maojo, Holge Illhard, Jose CrespoAbstract:Objectives: Bringing together structured and text-based sources is an exciting challenge for biomedical informaticians, since most relevant biomedical sources belong to one of these categories. In this paper we evaluate the feasibility of integrating relational and text-based biomedical sources using: i) an original Logical Schema acquisition method for textual databases developed by the authors, and ii) OntoFusion, a system originally designed by the authors for the integration of relational sources. Methods: We conducted an integration experiment involving a test set of seven differently structured sources covering the domain of genetic diseases. We used our Logical Schema acquisition method to generate Schemas for all textual sources. The sources were integrated using the methods and tools provided by OntoFusion. The integration was validated using a test set of 500 queries. Results: A panel of experts answered a questionnaire to evaluate i) the quality of the extracted Schemas, ii) the query processing performance of the integrated set of sources, and iii) the relevance of the retrieved results. The results of the survey show that our method extracts coherent and representative Logical Schemas. Experts’ feedback on the performance of the integrated system and the relevance of the retrieved results was also positive. Regarding the validation of the integration, the system successfully provided correct results for all queries in the test set. Conclusions: The results of the experiment suggest that text-based sources including a Logical Schema can be regarded as equivalent to structured databases. Using our method, previous research and existing tools designed for the integration of structured databases can be reused – possibly subject to minor modifications – to integrate differently structured sources.
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Logical Schema acquisition from text based sources for structured and non structured biomedical sources integration
American Medical Informatics Association Annual Symposium, 2007Co-Authors: Miguel Garciaremesal, Victo Maojo, Jose Crespo, Holge IllhardAbstract:In this paper we present a novel approach to integrate non-structured and structured sources of biomedical information. We part from previous research on database integration conducted in the context of the EC funded INFOGENMED project. In this project we developed the ONTOFUSION system, which provides a robust framework to integrate large sets of structured biomedical sources. Methods and tools provided by ONTOFUSION cannot be used to integrate non-structured sources, since the latter usually lack a Logical Schema. In this article we introduce a novel method to extract Logical Schemas from text-based collections of biomedical information. Non-structured sources equipped with a Logical Schema can be regarded as regular structured sources, and thus can be bridged together using the methods and tools provided by ONTOFUSION. To test the validity of this approach, we carried out an experiment with a set of five cancer databases.
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AMIA - Logical Schema acquisition from text-based sources for structured and non-structured biomedical sources integration.
AMIA ... Annual Symposium proceedings. AMIA Symposium, 2007Co-Authors: Miguel García-remesal, Victo Maojo, Jose Crespo, Holger BillhardtAbstract:In this paper we present a novel approach to integrate non-structured and structured sources of biomedical information. We part from previous research on database integration conducted in the context of the EC funded INFOGENMED project. In this project we developed the ONTOFUSION system, which provides a robust framework to integrate large sets of structured biomedical sources. Methods and tools provided by ONTOFUSION cannot be used to integrate non-structured sources, since the latter usually lack a Logical Schema. In this article we introduce a novel method to extract Logical Schemas from text-based collections of biomedical information. Non-structured sources equipped with a Logical Schema can be regarded as regular structured sources, and thus can be bridged together using the methods and tools provided by ONTOFUSION. To test the validity of this approach, we carried out an experiment with a set of five cancer databases.
Miguel Garciaremesal - One of the best experts on this subject based on the ideXlab platform.
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integration of relational and textual biomedical sources a pilot experiment using a semi automated method for Logical Schema acquisition
Methods of Information in Medicine, 2009Co-Authors: Miguel Garciaremesal, Victo Maojo, Holge Illhard, Jose CrespoAbstract:Objectives: Bringing together structured and text-based sources is an exciting challenge for biomedical informaticians, since most relevant biomedical sources belong to one of these categories. In this paper we evaluate the feasibility of integrating relational and text-based biomedical sources using: i) an original Logical Schema acquisition method for textual databases developed by the authors, and ii) OntoFusion, a system originally designed by the authors for the integration of relational sources. Methods: We conducted an integration experiment involving a test set of seven differently structured sources covering the domain of genetic diseases. We used our Logical Schema acquisition method to generate Schemas for all textual sources. The sources were integrated using the methods and tools provided by OntoFusion. The integration was validated using a test set of 500 queries. Results: A panel of experts answered a questionnaire to evaluate i) the quality of the extracted Schemas, ii) the query processing performance of the integrated set of sources, and iii) the relevance of the retrieved results. The results of the survey show that our method extracts coherent and representative Logical Schemas. Experts’ feedback on the performance of the integrated system and the relevance of the retrieved results was also positive. Regarding the validation of the integration, the system successfully provided correct results for all queries in the test set. Conclusions: The results of the experiment suggest that text-based sources including a Logical Schema can be regarded as equivalent to structured databases. Using our method, previous research and existing tools designed for the integration of structured databases can be reused – possibly subject to minor modifications – to integrate differently structured sources.
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Logical Schema acquisition from text based sources for structured and non structured biomedical sources integration
American Medical Informatics Association Annual Symposium, 2007Co-Authors: Miguel Garciaremesal, Victo Maojo, Jose Crespo, Holge IllhardAbstract:In this paper we present a novel approach to integrate non-structured and structured sources of biomedical information. We part from previous research on database integration conducted in the context of the EC funded INFOGENMED project. In this project we developed the ONTOFUSION system, which provides a robust framework to integrate large sets of structured biomedical sources. Methods and tools provided by ONTOFUSION cannot be used to integrate non-structured sources, since the latter usually lack a Logical Schema. In this article we introduce a novel method to extract Logical Schemas from text-based collections of biomedical information. Non-structured sources equipped with a Logical Schema can be regarded as regular structured sources, and thus can be bridged together using the methods and tools provided by ONTOFUSION. To test the validity of this approach, we carried out an experiment with a set of five cancer databases.
