Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Subject analysis, library of congress classification, part 1

1,542 views

Published on

  • Be the first to comment

Subject analysis, library of congress classification, part 1

  1. 1. Library of Congress Classification (Part 1) November 19, 20121
  2. 2. Overview  History  Characteristics  System Structure  Notational Structure  Double Cutters  Tables  Demo in Classification Plus2
  3. 3. History  LC Classification schedules developed 1898- 1910  Emphasized LC’s collection strengths: social sciences (political science, law, history)  Originally, little emphasis on humanities, religion & philosophy3
  4. 4. History (cont.)  Inearly years, schedules revised periodically  Today, schedules are revised continuously  Some schedules only recently published: – KIA-KIX, Law of the Indigenous Peoples in the Americas, currently in draft form (2013?) – KBS, Canon Law of Eastern Churches, 2012 – L, Education, revised 2012 – S, Agriculture, revised 20124
  5. 5. Characteristics  Enumerative - every topic explicitly listed  No synthetic features  3½ shelf feet long in paper!5
  6. 6. Characteristics (cont.)  Nonexpressive: notation does not reflect hierarchical relationships Example: QH501-531 Life QH540-549.5 Ecology QH573-671 Cytology6
  7. 7. Hospitality  Very hospitable: ability to accommodate changes is very great – Gaps in lettering & numbering used for new topics – Decimal numbers can be added  Examples: Subclass ZA (information resources) added to Z class in 1996 DB919.2.C94 History of Hungary—Ethnography— Elements in the population—Czechs (added October 15, 2012)  Monthly lists: http://classificationweb.net/approved/1210.html7
  8. 8. System Structure  21 classes using letters A General works B Philosophy. Religion C History: Auxiliary sciences … U Military science V Naval science Z Bibliography. Library science. Info resources8
  9. 9. System Structure (cont.)  Subclasses usually designated by a second letter (exceptionally by a third) Q Science (general) QA Mathematics QB Astronomy QC Physics9
  10. 10. System Structure (cont.) 7 categories provide structure within each schedule as well as within subcategories • Physical format • Philosophy • Study and teaching • General works • Laws and regulations • Juvenile works • Topical subdivisions10
  11. 11. Notational structure  Alphabetic subclasses are further divided by sequential cardinal numbers from 1 to 9999 Example: QC 1-75 Physics in general QC 81-114 Weights and measures QC 120-168.85 Descriptive and experimental mechanics11
  12. 12. Notational structure (cont.)  Decimal numbers are sometimes used when topics are added Example: QC 814 Early works through 1800 General works, treatises, and textbooks QC 815 1801-1969 QC 815.2 1970-12
  13. 13. Cutter Numbers in Classification  Cutter numbers developed for shelflisting – Arranges all works in a class by main entry (author or title)  In LCCS, cutter numbers are sometimes used to subdivide classes13
  14. 14. Cutter Numbers in Classification (cont.) Examples: Geomagnetism QC 811-QC 849 Observatories QC 818.A2 General works QC 818.A5-Z By region or country, A-Z A work on geomagnetism observatories in Poland would be classed in QC818.P714
  15. 15. Cutter Numbers in Classification (cont.) This results in two cutter numbers: 1. Subclass division 2. Cutter for main entry Example: The geomagnetism observatories of Poland / by I.C. Magnetyt. QC818.P7 $b M34 201215
  16. 16. Cutter Numbers in Classification (cont.)  Except in Class G, no more than two cutter numbers are allowed  In some cases, two cutter numbers are used in the classification tables. – The 1st cutter is for a topical subclass – The 2nd cutter is for a geographic country or locality or name of a corporate body, etc. – A digit is added to the second cutter for the main entry16
  17. 17. Cutter Numbers in Classification (cont.) Example: Propaganda and censorship during Canada’s great war / by Jeff Keshen, 1996. D639 class number for World War I .P7 subclass for propaganda C24 sub-subclass for Canada; added digit for Keshen 1996 year of publication17
  18. 18. Tables in LCCS  Recurring patterns of subdivisions appear in tables  References to tables appear in the schedules  Tables may contain: – Cutter numbers to be added to a base class, or – Arabic numbers to be added to a base number18
  19. 19. Classification Web Demo  Classificationschedules and tables  Classificationweb.net19
  20. 20. In-class exercise: classifying beavers (bobry) Classify the following topics: Mammals of the world Mammals of Poland Beaver reproduction Rodent reproduction Ecology of beavers Aquatic mammals of Central Europe Fossil beavers20

×