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JISC IE Metadata Schema Registry Technical Update 23 November 2004

JISC IE Metadata Schema Registry Technical Update 23 November 2004. Dave Beckett. Overview. Server and prototype walkthrough MEG client and problems Client Changes Walkthrough of client Technical status. Dublin Core AP Terminology. Metadata Vocabularies DC Elements [RDF Properties]

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JISC IE Metadata Schema Registry Technical Update 23 November 2004

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  1. JISC IEMetadata Schema RegistryTechnical Update23 November 2004 Dave Beckett

  2. Overview • Server and prototype walkthrough • MEG client and problems • Client Changes • Walkthrough of client • Technical status

  3. Dublin Core AP Terminology • Metadata Vocabularies • DC Elements[RDF Properties] • DC Encoding Schemes[RDF Classes]

  4. LOM AP Terminology • LOM Data Elements • Simple • “Root” • LOM Vocabularies • LOM (in the LOM standard) • Non-LOM (elsewhere) • LOM Data Types

  5. Prototype Server Contents • IEMSR model for DC and LOM • LOM: IEEE LOM, UK LOM Core AP • DC: 3 DC APs, 7 vocabularies

  6. MSR Prototype Server • Demonstration

  7. Server Prototype Issues • No authentication • No protocol updates • Web interface hard-coded • No user manipulation of results • However… easy to hack

  8. Future server work • Technologies (Java +) • Protocols and standards • HTTP (#1) • SPARQL for RDF to/from client • SRW, SRU, OAI, SOAP, … ??? • Web site • Driven from server • Apache Velocity ???

  9. MEG client (2002-2003)

  10. MEG client problems • Usability • Unfamiliar model (drag and drop) • Multiple windows • Aesthetics • Ugly • Technical • Hard to improve with Java and Swing

  11. MEG client updates needed • Better modelling • After MEG, CORES, evolving best practice • RDF standardisation • 2004 RDF specs • Protocol standardisation • SOAP, WSDL, OAI, SRW, SRU, SPARQL(sorry for the acronym soup)

  12. Technology changes • Replace Swing with SWT • OS native look and feel • Better looking User Interface • Application operation changed to better match OS norms • Removed drag and drop • Single window

  13. Process changes • Open Source using SourceForge • Multiple developers • Use an experienced desktop application developer to refactor the application • Early work focusing on client

  14. Important model changes for client • MEG client: DC AP • IEMSR client: DC AP and LOM AP • Modelling documents • Authentication • Moving to standardised service APIs • JISC IE requirements

  15. Client Walkthrough • Screenshots of current code • Some are mocked up UI

  16. Client Startup – Create Agency

  17. Loading an existing AP

  18. Two client modes • DC AP – building a set of property usages • LOM AP – selecting from a tree of data elements

  19. Create a new AP

  20. Dublin Core AP in the Client • Building an AP from emptyOR from an existing AP • Adding DC elements / Properties • Making Property Usages

  21. DC AP Profile properties

  22. DC AP Search for “title”

  23. LOM AP in the Client • Start from an existing AP:a sub-tree of the LOM • Refine / narrow what is allowed • Add requirements:mandatory, size • Edit, add vocabularies • [Later: Adding extension data elements]

  24. LOM AP search for “description”

  25. Current client state • Interface / model code separated • Not yet fully re-attached • Vocabulary updated for IEMSR • DCAP working soon • LOMAP model code is new • LOMAP UI is new • Running on Windows, OSX, Linux

  26. Client and Server timelines Client Server MEG model MEG server(existing code in Perl) MEG client MSR model MSR client MSR prototype server(MEG server updated) Nov 2004 MSR server(new code in Java) MSR model + new protocols Feb 2005 MSR client Web site

  27. Client and Server Summary • Browsing and searching – both • Browsing – much better on web • Editing – only in client

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