1 / 23

Using Literary Warrant to Define a Version of the DDC for Automated Classification Services

Using Literary Warrant to Define a Version of the DDC for Automated Classification Services. Diane Vizine-Goetz Research Scientist, OCLC Research Julianne Beall Assistant Editor, DDC ISKO Conference London, 13-16 July 2004. Exploratory Study. Defining a version of the DDC

lonna
Download Presentation

Using Literary Warrant to Define a Version of the DDC for Automated Classification Services

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Using Literary Warrant to Define a Version of the DDC for Automated Classification Services Diane Vizine-Goetz Research Scientist, OCLC Research Julianne Beall Assistant Editor, DDC ISKO Conference London, 13-16 July 2004 © 2004 OCLC Online Computer Library Center, Inc.

  2. Exploratory Study • Defining a version of the DDC • To facilitate automatic assignment of DDC numbers to electronic documents • Based on literary warrant for topics in electronic resources

  3. DDC for Automated Classification • Machine classification service • A database of concepts used to classify a document • Software that generates a prioritized list of concepts that characterize the content of the document (Scorpion)

  4. Checking Literary Warrant • Primary source for checking literary warrant: BUBL • Ca. 12,000 Internet resources • Canadian Information By Subject • Ca. 10,000 Internet resources • KidsClick! • Ca. 6,400 Internet resources

  5. http://bubl.ac.uk/link/ddc.html

  6. BUBL Site Statistics

  7. http://www.nlc-bnc.ca/caninfo/esub.htm

  8. http://sunsite.berkeley.edu/KidsClick!/dewey.html

  9. Defining a Version of the DDC • Starting point: classification numbers in Abridged Edition 14 • True abridgment: the truncated number for a topic is always the same as the full number for the topic, except shorter, e.g.: • 551.64 Forecasting and forecasts of specific phenomena • Cut back to 551.6 Climatology and weather

  10. Database Record • Class number • Caption • Superordinate hierarchy • Notes that describe what is found in a class • Relative Index entries • Mapped terminology

  11. Keywords from 551.64 Added to 551.6; 551.64 Deleted • Class-here note: methods of forecasting specific phenomena specific areas • Relative Index entries, e.g., • Acid rain—weather forecasting • Hurricanes—weather forecasting • Rain—weather forecasting • Subject Headings for Children LCSH • Storms—Forecasting

  12. Enriching Terminology for Numbers Built from Table 1 • Example: built number 520.6 • 520 Astronomy and allied sciences • Relative Index terms that approximate the whole of 520: • Astronomy • Celestial bodies • Outer space • Space—astronomy

  13. Built Number 520.6 • Relative Index terms from T1—06, e.g.: • Associations • Organizations • Combined entries for 520.6, e.g.: • Astronomy—associations • Astronomy—organisations • Astronomy—organizations • Celestial bodies—associations • Celestial bodies—organisations • Celestial bodies—organizations

  14. Subdivisions Added or Enriched

  15. Added UK Spellings for Index Entries 512.7 Number theory Factorisation—number theory Factorization—number theory Number theory Prime numbers 519.6 Mathematical optimization Mathematical optimisation Mathematical optimization Optimisation—mathematical Optimization—mathematics

  16. Results: Scorpion & BUBL A14.v1 base file + UK spelling A14.v2 base file + UK spelling + SS added/enriched A14.v3 base file + UK spelling + SS added/enriched + truncation

  17. Next Steps • Analyze where the truncation and the enriched terminology were useful and where not; revise the v3 database accordingly • Extend approach to additional classes and projects (ePrints UK)

  18. Links • Research : Projects : ePrints-UK • http://www.oclc.org/research/projects/mswitch/epuk.htm • Dewey • http://www.oclc.org/dewey/

More Related