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Tim Richards, Tim Green, Simo Varis

Tim Richards, Tim Green, Simo Varis. EFIS Information Resource Discovery - Demonstrator. (a.k.a EFIS-RD/ Metadata) 28 June 2005. EFIS – Information Resource Discovery. RD what it the EFIS-RD? What does it do? How does it do it? How is it different from the NEFIS – KB? Some examples.

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Tim Richards, Tim Green, Simo Varis

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  1. Tim Richards, Tim Green, Simo Varis EFIS Information Resource Discovery - Demonstrator (a.k.a EFIS-RD/ Metadata) 28 June 2005

  2. EFIS – Information Resource Discovery • RD what it the EFIS-RD? • What does it do? • How does it do it? • How is it different from the NEFIS – KB? • Some examples

  3. EFIS-RD What is it? • The EFIS Resource Discovery system is: • A metadata system for the entry, storage and retrieval of metadata on forest information resources • Based on the Dublin Core metadata element set • As such it is a catalogue of pointers to forest information resources / services • Initially developed as a metadata demonstrator in the EFIS project in 2001

  4. EFIS-RDHow does it work? • Descriptions of the NEFIS metadata elements are contained in a metadata schema in an XML document – metadata about metadata. • The metadata schema is used to dynamically generate HTML forms. If the schema changes then the forms change. • Metadata records stored in XML are also rendered into HTML • The system is implemented using open systems – Apache Tomcat, Apache Xerces XML parser, mySQL, Java Server Pages, Java Applets, ZaVal light weight visual components

  5. NEFIS Keywords • NEFIS Keywords are also stored in hierarchical XML documents and displayed in Java applets • for selection of keywords and • browsing by keyword.

  6. XML Schema Rendered into HTML EFIS-RD Metadata Entry

  7. EFIS-RDMetadata Search Multi-host searching

  8. XML View EFI-RDMetadata Retrieval

  9. EFIS-RDMetadata & Data • Metadata is a “means to an end” not just “an end in itself” – we don’t just want a description and a reference to an information resource we also want the data /information, for example for analysis and visualisation. • The metadata should be the “glue” that fixes the relationship between the user and relevant information.

  10. Data Visualisation/ Analysis Data Collation Decision Support Data Metadata Data Data Find Publish Bind Analyse Utilise Information Service EFIS-RD Distributed Data Searching - a “Web Service”

  11. 1 * Servers Client EFIS-RD Data Collection / Collation Demo – sub-national forest area statistics Standardised Data ...or Standardisation Toolkit Java XML-RPC servers provide national information services, data is packaged into XML for transport over HTTP, a multi-threaded XML-RPC client in the EFIS-RD system receives data from each server, collates it, presents it in a table and lastly prepares it for use in the VTK.

  12. Remote DataSearching,Collation,Visualisation

  13. NEFIS Demonstrator Footprint

  14. Conclusion • The EFIS-RD system was developed as a demonstrator in 2001 • Since it was originally developed the “service oriented architecture” and Web Services and related tools have emerged into the mainstream of distributed computing. • A new generation of “Forest Web Services”, including resource discovery (UDDI), service description (WSDL) and metadata / data packaging (SOAP) can now but constructed using open standards and tools, rather than relying entirely on bespoke applications.

  15. FML • What could FML do for the forest community? • FML could provide: • an explicit and extensible definition of forest metadata – a standard • a platform independent medium for the transfer of forest metadata - interoperability • an explicit and extensible meta description for forest data – a standard • A platform independent medium for the transfer of forest data - interoperability

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