1 / 38

“A Visual Toolkit For Information Retrieval”

“A Visual Toolkit For Information Retrieval” Authors: Antony Corfield, Matthew Dovey, Richard Mawby & Colin Tatham Presented by Antony Corfield & Richard Mawby. Presentation will consist of:. Introduction & Overview Technical Description Contacts & Information. Background. JISC/DNER

libby
Télécharger la présentation

“A Visual Toolkit For Information Retrieval”

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. “A Visual Toolkit For Information Retrieval” Authors: Antony Corfield, Matthew Dovey, Richard Mawby & Colin Tatham Presented by Antony Corfield & Richard Mawby Oxford University

  2. Presentation will consist of: • Introduction & Overview • Technical Description • Contacts & Information Oxford University

  3. Background • JISC/DNER • Funding the two-year project under the DNER Programme. • Z39.50 • “A computer-to-computer communication protocol designed to support searching and retrieval of information – - full-text documents, bibliographic data, images and multimedia – - in a distributed network environment. Based on client/server architecture and operating over the internet..” • Quote taken from William Moen, the ANSI/NISO Z39.50 Protocol [www.cni.org/pub/NISO/docs/Z39.50-brochure] Oxford University

  4. Background (Continued) • JAVA • This programming language ensures suitability for eventual audience as software is platform independent. Oxford University

  5. Aims Aims • Easy to use • Visual • Open Source • Encouraging ongoing development & maintenance of the software. Components enabling users to build portals without dealing with intricate technical aspects. Oxford University

  6. Components Components • JAFER has two basic components • ZClient • ZServer • Software based on Client/Server • architecture. • Written in Java and uses XML. • Components used separately or in • various combinations. Oxford University

  7. ZClient Uses • Reading List Generator • Using Z39.50 a web page reading list can be built. • Servlet • A link from a reading list to a record indicating the location of an item. • JSP (Java Server Pages) • Create dynamic web pages from Z39.50 sources. Oxford University

  8. Collaborations • RSLP (Research Support Libraries Programme) Book History And Design Project • RSLP Mapping Asia Project • HUMBUL Humanities Hub (a part of RDN - Research Discovery Network) • Oxford University Refugee Studies Centre • GFIS (Global Forest Information Service) Oxford University

  9. Collaborations (Continued) • (USGS) US Geological Survey • Microsoft • EU One-2 Project • JISC & NSF (National Science Foundation) Project - OMRAS (Online Music Recognition And Searching) • Possibly: Join-Up Programme & ILRT (Institute for Learning and Research Technology) Oxford University

  10. JAFER Toolkit Project • Software Developers • Antony Corfield • Colin Tatham • Topics • Design & Technologies • Visual Configuration Oxford University

  11. Toolkit – Basic Components • ZClient • Development of Portals for Access to Z39.50 Information Sources • ZServer • Provides Access to Non-Z39.50 Information Sources Oxford University

  12. JAVA • Portable – “Write Once, Run Anywhere” • Flexible – Object Oriented Approach • JavaBeans – Component Architecture allows Visual Configuration of Properties • Java Server Pages (JSP) – simple technology for building HTML pages with Dynamic Content Oxford University

  13. XML • Handles information in a way that is easy to Read, Process and Generate • Can be Transformed using Extensible Stylesheet Language (XSL) • Shares common goals of JAVA JAVA + XML = portable CODE, portable DATA Oxford University

  14. ZClient Architecture Oxford University

  15. XML query • Based on ‘Search’ mechanism developed by Global Information Locator Service (GILS) • Boolean Queries (Z39.50 type 101) represented as XML • Search Z39.50 Attributes can be defined by Default Search Profile e.g. Bath Profile Oxford University

  16. Query example <query><boolean> <and> <constraintModel> <constraint> ATTRIBUTES <semantic>4</semantic> title <position>3</position> any position </constraint> <model>Macbeth</model> search term </constraintModel> …. Oxford University

  17. Query example (cont.) …. <constraintModel> <constraint> ATTRIBUTES <semantic>1003</semantic> author <relation>3</relation> equals </constraint> <model>Shakespeare</model> search term </constraintModel> </and> </boolean></query> Oxford University

  18. Records – XML Serializers • XML Generated from retrieved Records • MARC to XML conforms to Open Archives Initiative (OAI) schema for MARC records • GRS to XML conforms to GILS schema for GRS1 records Oxford University

  19. MARC to XML example MARC 21 Field 260 260##$aNew York, N.Y. : $bElsevier, $c1984. <varfield id=”260” i1=”” i2=””> <subfield label=”a”>New York, N.Y. :</subfield> <subfield label=”b”>Elsevier,</subfield> <subfield label=”c”>1984</subfield> </ varfield > Oxford University

  20. XSL Transformations • Stylesheet used to Transform ‘raw’ XML to a form tailored to the user’s needs e.g. <publisher>New York, N.Y. : Elsevier, 1984 </publisher> Oxford University

  21. JSP – Providing Dynamic Content • Specify & Submit Query query.submit ( query.and ( “Macbeth”, “use title”, “Shakespeare”, “use author” )) • Save Query saveCurrentQuery ( “query.xml” ) Oxford University

  22. JSP – Providing Dynamic Content • Display Results setRecordCursor (n); record = getCurrentRecord () record.get( “title” ).getValue () record.get( “author” ).get( “name” ).getValue () Oxford University

  23. Configuration of ZClient • Visual Configuration • Builder Tools (developers) • Graphical User Interface (simple) • XML Configuration • XML file in Web Server (administrators) Oxford University

  24. Visual Configuration – Builder Tools • ZClient is a Java Bean • Java Beans have Properties which can be configured by using Visual Builder Tools • ZClient Bean properties include • Host or Target, Password etc. • Preferred Record Format, XML generation Oxford University

  25. Configuration - JBuilder Oxford University

  26. Visual Configuration using GUI • Simple, does not require Builder Tools • Bean Properties set using Tabbed Panes in User Interface Oxford University

  27. Configuration via GUI Oxford University

  28. Configuration via GUI Oxford University

  29. XML Configuration • Properties set by specifying parameters • e.g. web.xml file in Tomcat servlet container <init-param> <param-name>target</param-name> <param-value>library.ox.ac.uk</param-value> </init-param> Oxford University

  30. ZServer • Component Architecture • Configuration of Components provides different functions • Access to non-Z39.50 Information Sources • Distributed Searches (re-uses ZClient components) Oxford University

  31. Access to non-Z39.50 DataBase ZServer DB Client Host (target) Oxford University

  32. Distributed Searches Z39.50 ZServer + ZClient Non - Z39.50 Host Client Oxford University

  33. ZServer Components • ZServer • Manages Connections • Query Translation • Record Generation • Handler • Maps Attributes to DataBase Tables • Appropriate DataBase Driver ZServer Handler Oxford University

  34. ZServer - Visual Configuration • Server configuration • IP Address & Port binding • IP Validation & User Authentication e.g. ATHENS • Data Source configuration • Attribute mapping to Tables • Mapping between Tables and Record Fields Oxford University

  35. Server Configuration Oxford University

  36. Attribute Configuration Oxford University

  37. Downloads – org.jafer package • ZClient • Stable builds available as self-expanding Web Application Archive (WAR file) • Java code (Open Source) for developers • ZServer • Available from November 2001 Oxford University

  38. Project Director Matthew.Dovey@las.ox.ac.uk Project Administrator Richard.Mawby@las.ox.ac.uk Project Developers Antony.Corfield@las.ox.ac.uk Colin.Tatham@las.ox.ac.uk Development Website www.jafer.org/ Downloads Join mailing lists General Website www.lib.ox.ac.uk/jafer/ Contacts & Information Oxford University

More Related