Tim Richards, Tim Green, Simo Varis
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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

Tim Richards, Tim Green, Simo Varis

EFIS Information Resource Discovery - Demonstrator

(a.k.a EFIS-RD/ Metadata)

28 June 2005


Efis information resource discovery

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


Efis rd what is it

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


Efis rd how does it work

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


Nefis keywords

NEFIS Keywords

  • NEFIS Keywords are also stored in hierarchical XML documents and displayed in Java applets

    • for selection of keywords and

    • browsing by keyword.


Efis rd metadata entry

XML Schema

Rendered into HTML

EFIS-RD Metadata Entry


Efis rd metadata search

EFIS-RDMetadata Search

Multi-host

searching


Efi rd metadata retrieval

XML View

EFI-RDMetadata Retrieval


Efis rd metadata data

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.


Efis rd distributed data searching

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”


Efis rd data collection collation demo sub national forest area statistics

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.


Remote data searching collation visualisation

Remote DataSearching,Collation,Visualisation


Nefis demonstrator footprint

NEFIS Demonstrator Footprint


Conclusion

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.


Tim richards tim green simo varis

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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