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elena-project

http://www.elena-project.org. SQI vs. Wrapper. SQI main concern is the communication pattern Wrapper main concern is the heterogeneity of data definition and query languages, and schemas We need both!. Architecture. Target System. Wrapper. SQI. Implementation. SQI:

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elena-project

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  1. http://www.elena-project.org

  2. SQI vs. Wrapper • SQI • main concern is the communication pattern • Wrapper • main concern is the heterogeneity of data definition and query languages, and schemas • We need both!

  3. Architecture Target System Wrapper SQI

  4. Implementation • SQI: • Already implemented by Infonova (first prototype) with empty classes • Needs to be implemented only once • Wrapper: • Specific for any particular system • Development: usually complex task, but there is a lot of similarity among systems!

  5. Discussion - SQI • Goal: not to require to reimplement ‘SessionManagement’, … from partners who want to connect their systems to SQI network, but provide a packet, which can be customized • There are many similarities among different SQI implementations • Identify them! • Examples: • Separation communication management and wrapping • Analogous session management • Analogous handling of queries

  6. Discussion - Wrapper • Data definition language • E.g. SQL, XML, RDF, (Attrib,Value) list… • Elena: RDF • Query language (strongly related to DDL!) • Simple keywords, SQL, XQuery, QEL, … • Elena: QEL • Schema • LOM, Elena Common Schema, … • Elena: Elena Common Schema

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