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DDC metadata

DDC metadata. EDUG 2012 Symposium 26 April 2012 Boston Spa, UK. Michael Panzer Assistant Editor, DDC OCLC panzerm@oclc.org. Types of DDC data. Usually, Dewey numbers provide metadata for describing other resources

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DDC metadata

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  1. DDC metadata EDUG 2012 Symposium 26 April 2012 Boston Spa, UK Michael Panzer Assistant Editor, DDC OCLC panzerm@oclc.org

  2. Types of DDC data • Usually, Dewey numbers provide metadata for describing other resources • DDC as value vocabulary for metadata element sets • Instead, the following focuses on cases where Dewey numbers and DDC editions are the resources described • Two levels of DDC metadata • Number-level metadata (focus on bibliographic records) • Edition-level metadata (focus on classification records)

  3. DDC metadata • Metadata about • Dewey numbers (082, 083, 085 fields in MARC Bibliographic) • Provenance of machine-generated classication data • Dewey number components in linked 085 fields • Dewey editions (084, 686 fields in MARC Classification) • Interplay between class- and edition-level metadata rendered in MARC Classification format

  4. Agenda • Scenario • Provenance of machine-generated data • Edition-level metadata • Metadata about Dewey number components • Context • Proposal for MARBI; (metadata) provenance initiatives at W3C / DCMI • Relationship between translations and other “versions” • Enhancing Dewey numbers for retrieval

  5. MARBI proposal • Drafted over the last two months in cooperation with colleagues from DNB and LC • To be presented at MARBI meeting at ALA Annual Conference 2012 • Two options • Option 1: Addresses the immediate needs of documenting information about machine generation of classification data • Defines additional subfields in 082, 083, 084 • Option 2: Proposes a more general way of dealing with metadata provenance • Applicable to all MARC variable fields (in principle) • Heeds the distinction between provenance in general and metadata provenance in particular

  6. Option 1 • Defined for 082, 083, 084 • $i - Method of assignment designator Fully machine-generated (m) Not fully machine-generated (x) • $u - Process of assignment May contain a URI, a process name, or some other description of process designated in $i • $1 - Confidence value Confidence of the assigning agency in relation to the process described in $u. Contains value from the interval [0,1] • $q – Assigning agency (already defined)

  7. Examples • DDC 23 number assigned by LC using AutoDewey. The AutoDewey process involves machine assistance followed by intellectual review: • 082 00 $a829/.3$223$ix$uautodewey$11 • Fictitious example of DDC 22 number assigned by OCLC in a fully automated way using information in Classify: • 082 04 $a394.12$222$im$uclassify$10.5$qOCoLC  

  8. Option 2 • 883 - Data provenance (R) • First Indicator: Method of assignment • # - No information provided 0 – Fully machine-generated1 – Not fully machine-generated • $d - Date on which the linked field was generated • $u - Process used to generate linked field • $q - Agency using the process/activity to generate the linked field • $1 - Confidence value • $x - Ending date of validity • $0 - Authority record control number or standard number • $8 - Field link and sequence number (with new field link type “p – Data provenance”)

  9. Examples • 082 00 $81\p$a829/.3$223 • 883 1# $81\p$uautodewey$d20120407$qDLC$11 • 082 04 $81\p$a394.12$222$qOCoLC • 883 0# $81\p$uclassify$d20120407$qOCoLC$10.5

  10. Examples (2) • 082 04 $81\p$a004$222/ger$qNO-OsNB • 883 0# $81\p$udeweyclassifierv0.1$d20120101 $x20141231$qNO-OsNB$10.25$0(DE-101)040268942 • 082 04 $81\p$a004$222/ger$qDE-101 • 883 0# $81\p$uparallelrecordcopy$d20120101 $x20141231$qNO-OsNB

  11. Agenda • Scenario • Provenance of machine-generated data • Edition-level metadata • Metadata about Dewey number components • Context • Proposal for MARBI; (metadata) provenance initiatives at W3C / DCMI • Relationship between translations and other “versions” • Enhancing Dewey numbers for retrieval

  12. Edition-level metadata • Edition registry: capturing information about editions and translations in a centralized manner outside of MARC records • Storing additional metadata about editions/translations in MARC records • Better management of translation data and other versions • MARC does not offer edition-level records • Data info has to be carried in individual records, even when it applies to the whole edition • Relevant fields: 084 - Classification Scheme and Edition 686 - Relationship to Source Note

  13. DDC translations: Anatomy of an edition ItalianDDC 22 GermanDDC 22 FrenchDDC 22 Swedish Mixed DDC 22 Afrikaans Arabic Chinese French German Norwegian Portuguese Russian Scots Gaelic Spanish Swedish DDC 22 English French Italian Rhaeto-Romansch DDCSummaries DDC Sach-Gruppen (German) 200 Religion Class Guide(French) A14 Vietnamese A14 French A14 Hebrew A14 Spanish A14 Italian A14

  14. Types of editions • Related to an edition, with relationships not captured at record level • Examples: sdnb, DDC Summaries, Guide • versus • Related to an edition, with relationships captured at record level • Examples: 200 Religion, translations, A15engind

  15. Tracking edition-to-edition relationships • Translation of standard edition 084 1# $a ddc $c 15 $e ind • Source edition 084 1# $a ddc $c 15 $e eng • Authorized derivative version of standard edition 084 8# $a ddc $c 22sdnb $d 22 $e ger • Source edition 084 0# $a ddc $c 22 $e eng • Not explicitly full or abridged; “8” is used for value of first indicator • $n should be automatically populated with relevant information about the changes regarding the source edition.

  16. Tracking record-to-record relationships • 1. Record has been modified • Translation of standard edition084 1# $a ddc $c 15 $e ind686 3# $i modified • Source record084 1# $a ddc $c 15 $e eng

  17. Tracking record-to-record relationships (2) • 2. Record was created for translation • Translation of standard edition084 1# $a ddc $c 15 $e ind 686 1# $b 305.899 • Source record[does not exist]

  18. Tracking record-to-record relationships (3) • 3. Unmodified record from different source edition • Translation of standard edition084 1# $a ddc $c 15 $e ind686 0# $2 23 • Source record084 0# $a ddc $c 23 $e eng

  19. Agenda • Scenario • Provenance of machine-generated data • Edition-level metadata • Metadata about Dewey number components • Context • Proposal for MARBI; (metadata) provenance initiatives at W3C / DCMI • Relationship between translations and other “versions” • Enhancing Dewey numbers for retrieval

  20. 085 - Synthesized Classification Number Components • 085 fields provide information about components of Dewey numbers in linked 082 or 083 fields • Mirror 765 fields in MARC Classification format • Vital for faceted retrieval driven by Dewey numbers • Further enhancements possible by utilizing mappings of Dewey numbers that occur prominently as components, e.g, geographic data, time periods • Definition of new indexes is a requirement for retrieval use for WoldCat data

  21. Exploiting Dewey facets in WorldCat • Das Highlander-Kochbuch • 082 04 $8 1\x $a 641.594115 $q DE-101 $2 22/ger • 085 ## $8 1\x $b 641.59 • 085 ## $8 1\x $z 2 $s 4115 • 641.593-.599 Cooking characteristic of specific continents, countries, localities • T2—4115 Highland

  22. Proposed new indexes (083 fields) • “Dewey additional” index • da index: Add $z and $c ($y) to elements already in dd index • Pattern: [z--]a[-c][:a[-c]]

  23. Proposed new indexes (085 fields) • “Dewey components” index • dc index: Index $s and $t concatenated with full address • Pattern: [z--]rs|w[-c][:t] • “Dewey synthesized” index • ds index: Index all components • Pattern: [z--]a|b|rs|u|w[-c][:a|b|t|u|v[-c]] 

  24. Proposed new indexes (082/083/085 fields) • “Dewey general” index • dg index: Index all elements in Dewey numbers • Pattern: Combine dd, da, and ds indexes

  25. Example: History of Cologne during WWII Built number: 943.55140864 9 History & geography +T2—435514 Cologne + 943.0864Period of World War II, 1939-1945 082 00 $8 1\x $a 943/.55140864 $2 22 085 0# $8 1\x $b 9 $a 930 $c 990 $z 2 $s 435514 $u 943.5514 085 0# $8 1\x $b 943.5514 $a 930 $c 990 $v 01 $c 09 $f 0$r 943.0 $s 864 $u 943.55140864

  26. Access points / findability 082 00 $8 1\x $a 943/.55140864 $2 22 085 0# $8 1\x $b 9 $a 930 $c 990 $z 2 $s 435514 $u 943.5514 085 0# $8 1\x $b 943.5514 $a 930 $c 990 $v 01 $c 09 $f 0 $r 943.0 $s 864 $u 943.55140864 • Components in dc index: • 2--435514 • 943.0864 • Synthesized components in ds index: • 2--435514, 9, 930-990, 930-990:01-09, 943.0864, 943.5514, 943.55140864

  27. Scenarios / Use cases • Components / facets can be varied independently of each other • Allows for expanding, but also "morphing" the query by changing individual components • Integration of mapped vocabularies into Dewey-driven discovery process • Using terms that have been mapped to any number components • Usage of local hierarchies of number components instead of just the hierarchical relationships of the base number

  28. Example: Dewey-driven discovery Number components + mapped GeoNames • 394.120954394.12 + T2—54 • Neighboring countries: • China T2—51 • Pakistan T2—5491 • Bangladesh T2—5492 • Nepal T2—5496 • Bhutan T2—5498 • Myanmar T2—591 gn:neighbour 394.125 Meals notational 394.120954 structural 395.54 Table manners structural 394.13 Drinking of alcoholic beverages 394.13 +T2—51

  29. Thank You! Questions? Comments? Ideas?

  30. Some useful links

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