LIS618 lecture 5

1
LIS618 lecture 5

• Thomas Krichel
• 2002-10-14

2
Structure of talk

• Nexis.com
• OCLC firstsearch

3
Subject directory

• you can follow the subject tree but
• there seems to be only a tiny amount of documents
• categories are not particularly deep or developed
• there is a "more like this" feature of limited
  use, Thomas finds

4
Power search

• source selection, editing is possible
• use of connectors is possible here
• OR -- AND AND NOT
• PRE/n, n is a number, ordered proximity
• W/n, n is a number, unordered proximity
• W/S words in same sentence
• W/P words is the some paragraph
• no use of double quotes for paragraphs

5
Power search expressions

• Parentheses group terms together
• for one or no letter
• ! for any number of letters
• ATLEAST n(term), where n is a minimum number of
  occurrences
• PLURAL (term) only the plural of term
• SINGULAR (term) only the singular of term
• ALLCAPS (term) only capitals of term
• NOCAPS (term) no capitals of term
• CAPS (term) capitalized term only

6
power search for news

• uses power search expressions, plus
• hlead (expression)
• company (expression) for a company
• byline (expression) for the author
• show (expression) for a television show
  transcript

7
power search for legal data

• uses power search expressions, plus
• name (expression) for the name of a party
• cite (expression) for a citation expression for
  case law
• title (expression) for the title of a law article
• expression is a Boolean expression

8
other searches

• web searches
• news alert
• use this to get personal news
• do a search, then click on update to get to a
  screen where you can enter
• periodicity
• document type
• use query language to filter documents

9
a different query language

• terms are implicitly ANDed
• explicit AND and OR allowed
• phrases have to be put in quotes
• starts for any number of characters, not just
  one as in power search
• parenthesis can be used

10
Verdict on Nexis

• A lot more intuitive than Dialog
• Some confusion because three different query
  languages are used in the basic Nexis service.
  Some meta characters have different meanings
• Seems quite reliable.
• Essentially news, contents seems shallow at
  times.
• More full-text, easier to see items.

11
OCLC lastfind
12
OCLC FirstSearch

• WorldCat
• ArticleFirst
• Electronic Collections Online
• PapersFirst
• ProceedingsFirst
• UnionLists
• MLA Bibliography
• GPO government publications

13
WorldCat

• OCLC catalog of books, web resources, and other
  material worldwide
• Contains all the records cataloged by OCLC member
  libraries
• Offers around 50M bibliographic records
• Includes records representing 400 languages

14
types of stuff

• books and manuscripts
• websites and internet resources
• maps
• computer programs
• musical scores
• films and slides
• newspapers
• journals and magazines
• sound recordings
• videotapes

15
simple search

• expression
• field indicator
• keywords (basically anywhere)
• author
• title (recommend)
• limit to type of material (see next slide)
• limit to availability

16
limit to types

• basic types
• Books -- Serial Publications -- Articles
• Visual Materials -- Sound Recordings
• Musical Scores -- Computer Files
• Archival Materials -- Maps -- Internet
  Resources  
• subtypes
• audience
• contents
• format

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subtypes

• audience
• juvenile -- non-juvenile -- any
• contents
• fiction non-fiction biography music
• non-musical recording thesis/dissertation
• format
• large print braille microfilm non-microfilm
• manuscript cd-audio cassette recording
• lp recording vhs tape dvd/videodisk
• no logic between types and subtypes
• no "any" for format subtype

18
ranking

• Number of Libraries is the default
• Relevance Records
• Data on its calculation are scetchy
• Date records is reverse chronological order by
  year of publication
• No ranking records is reverse chronological
  order by addition to the database

19
indexed field expansion

• --Keyword Access Method --Accession Number
  Author
• --Author Phrase Conference Name --Conference Name
  Phrase Corporate Name --Corporate Name Phrase
• --Descriptor --Descriptor Phrase --Genre/Form
  Phrase
• --Geographic Coverage Phrase ISBN --Language
  Phrase
• --Material Type --Material Type Phrase --Named
  Conference Phrase --Named Corporation Phrase
• -- Named Person Phrase-- Notes/Comments --
  Personal Name --Personal Name Phrase Publisher
  -- Publisher Location --Series Title -- Series
  Title Phrase --Standard Number Subject --Subject
  Phrase Title --Title Phrase

20
advanced search

• has features of basic search with type and
  subtype listings
• search is fielded (see previous slide for
  fields), up to three Boolean combination in the
  search terms
• publication year range
• language (problems with input)
• minimum number of libraries

21
index labels I

• Keyword kwcoffee or tea and house
• Accession number no37993343
• Access Method am www oclc org
• Author ausaint-arroman
• Author phrase ausaint-arroman auguste
• Citation crmagazine index
• Conference name cncanadian

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indexing labels ii

• Corporate name codouble five
• Descriptor devoice disorders
• Dewey class number dd998.900
• Extended author(s) eagershwin ira harburg yip

23
index terms ii

• Extended title etcentury events
• Genre/Form phrase gescreenplays
• Geographic coverage phrase gccapetown
• Government document number gny4p9610w29
• Identifier idriemann
• ISBN nb3196311821 (omit hyphens)
• ISSN ns4069-6571 (use hyphens)

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index terms iii

• Language lnjapanese
• Library of Congress Call Number lchd9000.6
• Library of Congress Control Number nlmap 64-119
  rev
• Material type mtvhs
• Music number muhas19832
• Musical composition mcjazz
• Named conference phrase cfworld conference on
  women

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index terms iv

• Named corporation phrase ncintel corporation
• Named person phrase namandela nelson
• National Agricultural Library call number
  agsf223.w47
• National Library of Canada call no.casf209.5
• National Library of Medicine (NLM) call
  numberlmasa0011970
• Notes/Commentsnttranslation-adaptation
• Personal name pnlemaire

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index terms v

• Publisher location plchina
• Report number rnnofhwap179012
• Series title seemb report
• Series phrase titleseemb evaluation report
• Secondary formatstbks
• Standard numbersn1092-177
• Subject sucoffee and tea house
• Subject phrase sucoffeehouses in art
• Subject all saauthors american biography
• Subject headings, LC hlbiography

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index terms vi

• Subject headings, LC children's literature
  hcparties
• Subject headings, LC children's lit phrase
  hcchildrens writing
• Subject headings, MESH hmoptometry
• Subject headings, MESH phrase hmvision low
• Subject headings, NAL hafruit
• Subject headings, NAL phrase hafruit trees
• Subject headings, NLC hephotography
• Subject headings, NLC phrase helandscape
  photography

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index terms vii

• Subject headings, RVM hrindiens
• Subject headings, RVM phrase hrpolitique
  sanitaire
• Subject headings, Sears hslegends
• Subject headings, Sears phrase hsjewish legends
• Title timusic w3 british w3 enlightenment
• Uniform title utbible
• Unique serial title tkrenew annual report
• Universal decimal class no.ud101-051
• Update Date up20020101
• Vendor information vnlibros
• Year of publication yy1997

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word and phrase indexing

• colon means word indexed field
• equal means phrase indexed field.
• For word indexed fields, there are proximity
  operators
• X w Y (X is followed by Y)
• X wi Y (X is followed by Y with at most i terms
  between)
• X n Y (X is next to Y, either order)
• X ni Y (X is within i terms of Y, either order)

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truncation and wildcards

• Use for plurals (s and es)
• Use for truncation
• Use ? for zero to nine additional characters
• Use ?i for up to i characters
• Use for a single character, i.e. an
  abbreviation of ?1.

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Boolean operation

• you can combine elementary search operations
  using Boolean operations OR, AND, NOT
• a NOT b means a AND NOT b.
• there are operator precedence rules, but it is
  best to rely on parenthesis.

32
other OCLC databases

• search interfaces are almost identical
• Verdict
• easy to learn but very powerful query language.
• system is fast.
• friendly layout
• some technical data is missing in the help screens