Slides from the IUG 2008 talk

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  • 1. UsingMAJAX andGoogle Book Classes in Mashups Annette Bailey University Libraries Virginia Tech April 29, 2008

2. User reviews Faceted browsing RSS feeds Mashups Wikis Blogs Tagging LibX Library 2.0 3. Mashups

  • Are hybrid web applications that combine information drawn from various web sources
  • Simple example:
    • A library web page that includes a news feed

4. Mashup Example Library Homepage Latest Library News Items 5. Mashup Sources

  • RSS Feeds
  • Web services, e.g. Google API, Amazon API
  • StrikeIron is a market place that matches providers and users
  • How can the III Millennium system become an information source for mashups?
    • Thats where MAJAX comes in

6. MAJAX Overview

  • Millennium AJAX is software that allows mixing catalog data into web pages
    • Freely available from VT
    • Simple to install & use
    • No III support required
    • No plug-in for users to install

7. New Books List

  • Library publishes a list of newly acquired books every month
  • We would like to includeup-to-the-minutecirculation information in this list

8. New Books List Demo 9. New Books List 10. MAJAX

  • M illenniumAJAX
  • A synchronous
    • Query the catalog without the user having to wait
  • J avaScript
    • Run in clients browser to construct page content
  • A nd
  • X ML
    • (Really HTML) comes from a web service: here, Millenniums MARC display

11. Screen Scraping MARC 12. Course Page Demo A professor wants to offer a list of books on his course page, along with full bibliographic and up-to-the-minute holdings information about each book 13. Course Page Demo

  • Screen Shot

14. The Pyramid of Web Skills Librarians Programmers PhP, Ruby, JavaScript HTML 15. Installing & Using MAJAX

  • To install MAJAX at your institution, upload two files to your catalogs /screens directory:
    • majax.js
    • majax.html
  • To use MAJAX in web pages
    • include
    • include tags wherever library catalog information should be inserted

16. Course Page HTML 17. MAJAX Identifiers

  • IDENTIFIER can refer to ISBN, Bibrecord #, OCLC #, or Book Title

ISBN i i006073132XBibrecord .b .b2275560 OCLC # o o57207630 Title t tfreakonomics 18. MAJAX Alternative Syntax

  • IDENTIFIER
  • T can be i, o, t, or .b
  • IDENTIFIER as defined on previous slide without leading character

0596002556 19. MAJAX Classes Holdings Related majax-showholdings majax-showholdings-brief majax-showholdings-div majax-ebook majax-showholdingslocations Bibliographic Information majax-marc-??? majax-marc-???-? majax-harvard-reference majax-endnote majax-endnote-switch majax-endnote-import Miscellaneous majax-syndetics-* majax-linktocatalog majax-reportfailure majax-newline majax-space 20. MAJAX Examples (1) MAJAX class MAJAX output majax-harvard-reference Levitt, Steven D., Dubner, Stephen J., 2005,Freakonomics : a rogue economist explores the hidden side of everything /1st ed., New York, William Morrow, xii, 242 p. ;majax-showholdings-div Copy 1: available Copy 2: due 05-10-07 Copy 3: due 07-22-07majax-marc-050 HB74.P8 L479 2005 21. MAJAX Examples (2) MAJAX class MAJAX output majax-ebook[Electronic Book] majax-marc-050majax-linktocatalogHB74.P8 L479 2005 majax-syndetics-vtech 22.

  • Create a new file: majaxcustomize.js
  • Include the file using a

MAJAX Customization

  • Define your customized variables

var singleCopyStatus = Un exemplaire est %s; 23. Load Considerations

  • MAJAX uses caching and sends exactly 1 request per unique item per page to the server
    • Regardless of the number of span tags referencing an item
  • MAJAX imposes additional load on your III system
    • Currently self-limiting to 100 requests per second per page, which can be changed.
  • To turn MAJAX capabilities off, simply remove majax.html & majax.js from the /screens directory.

24. Limitations

  • MAJAX works only on web pages from within the same domain as your Millennium system
  • If Millennium runs on addison.vt.edu, MAJAX can be used on all pages in *.vt.edu
    • www.lib.vt.eduOk
    • courses.cs.vt.eduOk
    • livejournal.comNot Ok(needs a proxy)
  • MAJAX works in Internet Explorer 6.x and up, Firefox, and Safari browsers
    • Will fail silently on other browsers

25. MAJAX Summary

  • MAJAX provides the ability to include live catalog information in any webpage on your domain
    • Without special server support, access or programming
    • Without requiring end users to install any plug-ins
  • It is easy to use, requiring only HTML skills
  • Free!
  • Has been adopted by a number of III libraries
    • Users have contributed suggestions, bug fixes, and help test it

26. Part 2 Google Book Classes 27. Mashing a Service into the III Catalog Display

  • MAJAXmashes catalog data into other web pages
  • Now well mash data from another service into the library catalog

28. Google Book Search Book Viewability API

  • Programmatic client-side access to small set of Google Book Search information
    • Provides thumbnails of book covers
    • Provides link to Googles book information, preview, or full text pages
    • Provides information on whether Google has full text, partial preview, or no preview
    • Indexed by ISBN#, OCLC#, LCCN#
  • Released March 2008

29. Goals

  • We want to incorporate information from Google Book Search into our catalog
    • E.g., allow users to see a preview of a book if one is available from Google
    • Or use Googles book covers
  • Without JavaScript coding
    • (even though Googles API requires JavaScript coding as it is)

30. Google Book Classes Demo 31. Google Books Demo Buttons appear if Google Book Search has a partial preview of book 32. Google Books Demo (2) Buttons appears if Google has a partial preview of book 33. Google Book Classes

  • A JavaScript library and set of classes that simplify using the Google Book Search Book Viewability API
    • Can be used on any web page, including inside the Millennium system
    • Usage is much like MAJAX
    • Available from libx.org/gbs

34. Using Google Book Classes (on general web server)

  • Upload a copy of gbsclasses.js to your server
  • Include gbsclasses.js in a
  • Include the class(es) in tags

35. GBS Identifiers

  • IDENTIFIER can refer to ISBN #, OCLC #, or LCCN#
  • Alternate syntax: use * as IDENTIFIER

ISBNISBN:006073132XOCLCOCLC:57207630 LCCN LCCN:2004022563 36. Using Google Book Classes in Millennium

  • Include gbsclasses.js in HTML template file via
    • E.g. toplogo.html
  • Use IIIfieldspectoken to insert HTML that includes the Google Book Classes into the briefcit.html file

37. briefcit.html briefCitPub

38. A Google Preview Button briefcit.html Inside Publisher box Insert 1x2 HTML table 260 Field goes in left columnhide span initiallyLink to info page but only if Google has a partial viewRemove span if Google does not index this ISBN III will put first 020 Field here 39. Currently Supported Google Book Classes
  • Thumbnails Image
    • gbs-thumbnail
  • Wrap span in a hyperlink
    • gbs-link-to-preview
    • gbs-link-to-info
    • gbs-link-to-thumbnail
  • Conditionals: only keep span if
    • gbs-if-noview
    • gbs-if-partial-or-full
    • gbs-if-partial
    • gbs-if-full
  • Remove if Google does not index book
    • gbs-remove-on-failure
  • Multiple classes can be combined
40. Google Book Classes: Summary
  • Google Book Classes allows the use of the Google Book Viewability API in mashups
    • Without requiring any JavaScript or AJAX knowledge
    • Allows integration in places (such as III briefcit.html) where control of a page is limited
41. Acknowledgements
  • Dr. Godmar Back
    • Assistant Professor Computer Science
42. Questions? Thank you! http://libx.org/majax http://libx.org/gbs Contact us: [email_address] 43. WebBridge Example (1) majax resource 1 majax resource 2 majax resource 3 44. WebBridge Example (2) majax resource 1 majax resource 2 majax resource 3 45. Setting Up MAJAX for WebBridge
  • Add
  • WebBridge Management interface
    • Create 1 or more resources
    • Associate hasISBN or hasTitle data tests
    • Embed tags inLink Displayfield