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WebVoy ge with a Wrapper

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WebVoy ge with a Wrapper

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    1. WebVoyáge with a Wrapper Michael Doran, Systems Librarian doran@uta.edu

    2. Michael Doran, Systems Librarian Once upon a time…

    3. Michael Doran, Systems Librarian What is a handsome OPAC? Aesthetically handsome Functionally handsome An OPAC is “handsome” if it is simple to use is intuitive to use makes it easy to find stuff “Only librarians like to search, everybody else likes to find.” – Roy Tennant

    4. Michael Doran, Systems Librarian Simple searches

    5. Michael Doran, Systems Librarian WebVoyáge simple search

    6. Michael Doran, Systems Librarian WebVoyáge simple search?

    7. Michael Doran, Systems Librarian It was soooo simple…

    8. Michael Doran, Systems Librarian WebVoyáge simple search (after)

    9. Michael Doran, Systems Librarian Code

    10. Michael Doran, Systems Librarian WebVoyáge server-side back end

    11. Michael Doran, Systems Librarian WebVoyáge is a “black box” “A black box is any device, sometimes highly important, whose workings are not understood by or accessible to its user.”“A black box is any device, sometimes highly important, whose workings are not understood by or accessible to its user.”

    12. Michael Doran, Systems Librarian They call it a wrapper

    13. Michael Doran, Systems Librarian They call it a wrapper

    14. Michael Doran, Systems Librarian Basic wrapper script

    15. Michael Doran, Systems Librarian Do your thing to that datastream aka “screen scraping” “A technique in which a computer program extracts data from the display output of another program. The key element that distinguishes screen scraping from regular parsing is that the output being scraped was intended for final display to a human user, rather than as input to another program, and is therefore usually neither documented nor structured for convenient parsing.” [from Wikipedia] text wrangling add text delete text rearrange text

    16. Michael Doran, Systems Librarian Example – adding text Voyager’s “header.htm” file is inserted after the <body> tag okay for display tags, but not for others Wrapper script can insert elements within the <head> tag metadata JavaScript CSS

    17. Michael Doran, Systems Librarian Example – adding text

    18. Michael Doran, Systems Librarian Example – removing text

    19. Michael Doran, Systems Librarian Example – rearranging text

    20. Michael Doran, Systems Librarian Show and go keyword anywhere search words within quotes are treated as a phrase other words are automatically Boolean ANDed* relevancy ranked results*

    21. Michael Doran, Systems Librarian No secret handshakes last name, first name for author searches no initial articles for title searches Library of Congress subject headings Boolean operators what an index browse is

    22. Michael Doran, Systems Librarian Wrapper script redux Read and parse form input QUERY_STRING (get method) STDIN (post method)

    23. Michael Doran, Systems Librarian Truncation adaptation

    24. Michael Doran, Systems Librarian Incoming data

    25. Michael Doran, Systems Librarian Incoming data

    26. Michael Doran, Systems Librarian Example – truncation adaptation

    27. Michael Doran, Systems Librarian Example – truncation adaptation

    28. Michael Doran, Systems Librarian Other input data munging fix Voyager 6.x GKEY/TKEY/SKEY keyword “multiple spaces" no hits bug (Support Web incident #131344) $search_arg =~ s/ / /g; deal with “right single quotation mark” vs. “apostrophe” in search input issue allow for ISBNs with dashes* * (combined output/input) data munging

    29. Michael Doran, Systems Librarian Is a wrapper right for you? requires some programming expertise requires lots (and lots) of testing test platform ideally a Voyager test server separate WebVoyáge instance (a la preview server) law of unintended consequences extra layer makes WebVoyáge more brittle more dependencies, e.g. with opac.ini upgrades more complicated

    30. Michael Doran, Systems Librarian Getting started wrappers are language-neutral, however… Perl is good designed for text processing robust regular expressions is already on your system example wrappers available it’s fine to think big… … but start small

    31. Michael Doran, Systems Librarian Resources Michael Doran, University of Texas at Arlington Presentation: “WebVoyáge with a Wrapper” Source code: http://rocky.uta.edu/doran/wrapper/ Ere Maijala, National Library of Finland EEndUser 2006 presentation*: “Enhancement scripts for WebVoyáge OPAC” * password required – see European EndUser on SupportWeb Source code: http://www.lib.helsinki.fi/english/libraries/linnea/resources/pwebrecon2.htm

    32. Michael Doran, Systems Librarian A small start copy original Pwebrecon.cgi cp –p Pwebrecon.cgi Pwebrecon-orig.cgi create Pwebrecon.cgi wrapper template add desired feature test

    33. Michael Doran, Systems Librarian Q & A

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