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Data Sharing Protocols for Meteo Marine Measurements

Data Sharing Protocols for Meteo Marine Measurements. Attilio Colagrossi APAT. Data Integration Systems.

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Data Sharing Protocols for Meteo Marine Measurements

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  1. Data Sharing Protocols for Meteo Marine Measurements Attilio Colagrossi APAT ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  2. Data Integration Systems Data integration systems have been developed to provide a global view of a collection of related data sources, so that all the information needed can be accessed uniformly, transparently and independently of the physical storage location, as if it was stored into a single data source. ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  3. Data Warehouse and Mediator Approaches The problem of integrating heterogeneous data sources has been deeply investigated in the last decades. Previous research has shown a number of solutions, which can be broadly grouped into two main approaches, namely Data Warehouse and Mediator. ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  4. Possible Mediator Implementations The Mediator (or Virtualized) approach comprehends a number of different implementations, such as the Knowledge-based Information Integration Systems, the Agent-based Systems, the Information Retrieval Systems and the Federation Information Systems (FIS). ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  5. The Federation Information System FIS, in particular, grants the data sources composing the integration system to be: - autonomous, as they can continue to operate independently; - heterogeneous, as they can be produced by different vendors and use different data models as well as different query languages; - distributed, as they can be physically located on different hosts. ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  6. Aim of the Proposal The aim is to develop an information broker to provide a full and user-transparent integration of the heterogeneous data sources, ensuring, at the same time, the existing legacy applications that operates on them to continue operating autonomously, without undergoing any sort of modification ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  7. The Information BrokerMain Characteristics - 1 According to the taxonomy of FIS, the proposed broker is a Federated Database System (FDBS), where all the components in the federation are structured sources accessible by a specific query language. ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  8. The Information BrokerMain Characteristics - 2 A FDBS typically provides a federated schema to ensure full location and schema transparency to its users. It has a static architecture in that a FDBS does not allow a flexible structural change management of its components. ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  9. The Information BrokerMain Characteristics - 3 Unlike the typical FDBS implementation, our broker is also enriched with a set of web services used to enable the provision of data on demand, whilst keeping the underlying data sources unchanged and autonomous ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  10. Building the Information Broker 1-Schema Integration Schema integration refers to the process of integrating data-source local schemas into a single federated schema that will provide a global view of the federation. The local schemas of the different component databases within the federation represent the starting point for building a federated schema. ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  11. Schema Integration Process ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  12. Building the Information Broker 2-Architecture the broker architecture is organized in three main layers: the wrapper, which resolves the technical differences among the data sources available. the federation, which offers a uniform way to access the data stored in data sources the presentation, which allows users to perform global queries. ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  13. Information Broker Architecture ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  14. Query execution performed by a DAS ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

  15. Query Processor and its Components ADRICOSM-EXT Final Meeting - Rome, 21 november 2006

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