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

17. 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 Keywordkw:coffee or tea and house+ Accession numberno:37993343 Access Methodam:www oclc org Authorau:saint-arroman Author phrase au=saint-arroman auguste Citationcr:magazine index Conference namecn:canadian

22. indexing labels ii Corporate nameco:double five Descriptorde:voice disorders Dewey class numberdd:998.900 Extended author(s) ea:gershwin ira harburg yip

23. index terms ii Extended titleet:century events Genre/Form phrase ge=screenplays Geographic coverage phrase gc=capetown Government document number gn:y4p9610w29 Identifierid:riemann ISBNnb:3196311821 (omit hyphens) ISSNns:4069-6571 (use hyphens)

24. index terms iii Language ln=japanese Library of Congress Call Number lc:hd9000.6 Library of Congress Control Numbernl:map 64-119 rev Material typemt:vhs Music number mu:has19832 Musical compositionmc:jazz Named conference phrase cf=world conference on women

25. index terms iv Named corporation phrase nc=intel corporation Named person phrase na=mandela nelson National Agricultural Library call number ag:sf223.w47 National Library of Canada call no.ca:sf209.5 National Library of Medicine (NLM) call numberlm:asa0011970 Notes/Commentsnt:translation-adaptation Personal name pn:lemaire

26. index terms v Publisher location pl:china Report number rn:nofhwap179012 Series title se:emb report Series phrase titlese=emb evaluation report Secondary formatst=bks Standard numbersn:1092-177 Subject su:coffee and tea house+ Subject phrase su=coffeehouses in art Subject all sa=authors american biography Subject headings, LC hl:biography

27. index terms vi Subject headings, LC children's literature hc:parties Subject headings, LC children's lit phrase hc=childrens writing Subject headings, MESH hm:optometry Subject headings, MESH phrase hm=vision low Subject headings, NAL ha:fruit Subject headings, NAL phrase ha=fruit trees Subject headings, NLC he:photography Subject headings, NLC phrase he=landscape photography

28. index terms vii Subject headings, RVM hr:indiens Subject headings, RVM phrase hr=politique sanitaire Subject headings, Sears hs:legends Subject headings, Sears phrase hs=jewish legends Title ti:music w3 british w3 enlightenment Uniform title ut:bible Unique serial title tk:renew annual report Universal decimal class no.ud:101-051 Update Date up:20020101 Vendor information vn:libros Year of publication yy:1997

29. 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)

30. 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.

31. 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