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Using Tables in Class Web

Using Tables in Class Web . Brief overview: What are tables in the classification schedules? Originally to conserve space and an easy way to apply iterative numbers Some classes (Literature, Law, Geography) have more than others

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Using Tables in Class Web

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  1. Using Tables in Class Web • Brief overview: What are tables in the classification schedules? • Originally to conserve space and an easy way to apply iterative numbers • Some classes (Literature, Law, Geography) have more than others • Can be found within the print schedule itself or published separately (P-PZ Tables)

  2. Instructions for when to use tables to generate numbers found within the schedule:e.g. PG3321.A64 (P-PZ40 table) • 2004 print edition of P-PZ Tables were restructured and new tables created to facilitate automatic calculation and display of numbers and captions in Class Web. • 2006 print edition of P-PZ Tables for individual authors (P-PZ39, P-PZ40, P-PZ44) were further revised to reduce complexity and simplify shelflisting subarrangements. • New/revised numbers and captions are added by a proposal process from Library of Congress catalogers and cooperating institutions.

  3. How it works in Class Web • Table numbers are automatically calculated as long as Class Web is in enhanced mode (option must be set) • Users can toggle between the schedules and the tables in Class Web at the top of the navigation pane • Comparison between the printed version and Class Web:

  4. Using the paper schedules users have to apply the author number to create the full classification number for “autobiography, journals, memoirs, etc.” = PG3330.F35Z46 • Using Class Web, the number is generated already:

  5. Law schedules are even more dramatic application of Class Web automatic number calculation • Looking up the number for Albany, NY, for school integration monographs, the user is directed to Table KF10A, and must add 11.1.S34 plus go to another table, Table KF13 to arrive at the number KFX1021.1.S34A2:

  6. With Class Web, the process is much simpler and the number is derived through clicking on the appropriate links in the enhanced browser setting

  7. Behind the scenes • Programming rules are applied in Class Web to handle table application, based on coding in the MARC classification records. The nine rules are:

  8. Add table number to number in 761/b if present or else the number in 153/a. When using field 761/b, suppress any table records if the calculated number is less than the value in the schedule record's 153/a. Subtract 1 from number in 153/a and add table number to result. Append table number to number in 153/a. Substitute cutter number (everything from last period on) for the "x" in the table span. Delete .A from 153/a and append Cutter number from table to result. Subtract 5 from number in 153/a and add table number to result. If table # starts with .x1 replace all of 153/a except last digit with what follows .x1.If table # starts with .x2 replace all of 153/c except last digit with what follows .x2. Substitute Cutter number from 153 $a for "x1" in table; substitute Cutter number from 153 $c for "x2" in table; then append any element in the table following "x2". Append table number to number in 153/a and suppressing the period if this is a secondary cutter (check for parent that is a table). This is a refinement of rule number 3.

  9. In summary • The enhanced browser option must be selected for automatic table calculation • Resulting Class Web generated numbers are not in the printed schedule; there are no authority records for these generated numbers and therefore not searchable in the traditional sense. However they can be generated on the fly with understanding of how tables work

  10. More information about Class Web • Class Web is available for a 30-day free, no obligation trial. Pricing and ordering information is available from: http://www.loc.gov/cds/classweb/ Or visit any of the friendly booth staff!! Thank you!!

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