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Maintaining the integrity of e-book titles in CityU library catalogue

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1 Maintaining the integrity of e-book titles in CityU library catalogue
7th HKIUG, 12 Dec 2006, HKUST Joanna Pong, Philip Wong Run Run Shaw Library City University of Hong Kong

2 Table of Contents Growth of e-books in CityU Duplication problems
Attempted solutions Effective Solutions De-duplication jobs Benefits and limitations Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

3 1. Growth of e-books in CityU
E-book collection contains English e-books, Chinese e-books & e-theses From 2001: NetLibrary (around 200 titles) To Oct 2006: > 200,000 titles English e-books: > 87,000 titles Chinese e-books: > 45,000 titles e-theses: > 70,000 titles Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

4 1. Growth of e-books in CityU (cont’d)
Acquisition of e-books from 2001 onwards English ebooks Chinese ebooks eTheses Total 200 >200 100 >300 >400 1,300 1,400 39,000 >40,000 77,000 44,000 31,000 >150,000 (Jul-Oct 06) 8000 >8,100 >87,000 >45,000 >70,000 >200,000 Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

5 1. Growth of e-books in CityU (cont’d)
Total > 200,000 titles Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

6 1. Growth of e-books in CityU (cont’d)
Major e-book collections Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

7 1. Growth of e-books in CityU (cont’d)
E-theses Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

8 1. Growth of e-books in CityU (cont’d)
Consortial acquisition of e-books Digital Dissertation Consortium – since 2005 Apabi D-Lib Consortium – since 2006 NetLibrary Super E-book Consortium – since 2006 New consortia Electronic Resources Academic Library Link (ERALL), a JULAC project on collective e-book collection development Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

9 1. Growth of e-books in CityU (cont’d)
Growth of e-book usages (from CGI Logs) -- showed an uprising trend eBooks Yr 2004 Yr 2005 Yr 2006 % Growth 05 to 06 Apabi 588 5196 8047 55% ebrary - 5922 18467 212% netLibrary 1928 2563 14753 476% Safari 1488 1768 19% Wiley InterScience 302 1291 327% Digital Dissert. Con. 9881 11485 16% ProQuest Dissert. 1594 3171 99% Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

10 2. Duplication problems The variety of e-book collections and high number of titles created problems in cataloguing A major problem-> Title duplication We load records supplied by different vendors, resulted in title duplication More e-book titles, more title duplication same title from different collections same title from same collection Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

11 2. Duplication problems (cont’d)
Duplication from different collections Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

12 2. Duplication problems (cont’d)
Duplication from the same collection NetLibrary collection Titles purchased by CityU since 2001 Titles acquired via Super-ebook Consortium Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

13 2. Duplication problems (cont’d)
Same title from NetLibrary acquired in different period Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

14 2. Duplication problems (cont’d)
Duplication from the same collection (cont’d) UMI e-theses Titles purchased by CityU since 2002 Titles acquired via Digital Dissertation Consortium Titles in ProQuest Database Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

15 2. Duplication problems (cont’d)
Same UMI e-thesis title acquired in different period Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

16 3. Attempted solutions Single record approach in cataloguing
We apply single record approach for all e-versions of the same title Applied to e-books and e-journals Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

17 3. Attempted solutions (cont’d)
Duplication control in e-journals CityU applied and modified BU’s program to merge e-journal titles from aggregator databases Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

18 3. Attempted solutions (cont’d)
Duplication control through manual methods For e-books, our previous solutions Manual checking Headings reports – duplicate call numbers Loading through match field 001 – identify duplicate records Encounter basis Okay when the number of titles remains small Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

19 3. Attempted solutions (cont’d)
Duplication control through customized load profiles The first attempt to automate the procedure Utilized the local load profiles and translation table in INNOPAC to merge 2 sets of NetLibrary titles Super E-book Consortium titles purchased in 2006 NetLibrary titles purchased since 2001 2,206 titles were found duplicated Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

20 3. Attempted solutions (cont’d)
Duplication control through customized load profiles (cont’d) Using load profiles is not a complete solution Cannot match multiple tags (cannot match tag 020 against tag 024) Cannot match selected sets (cannot exclude print titles) Cannot merge multiple records automatically; must output for manual checking to decide the master record Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

21 4. Effective Solutions Cataloguing worked with Systems to run de-duplication and merging of records Prerequisite easy to apply able to fit in the existing workflow have flexibility to handle different sizes of e-book batches allow prompt or ad hoc loading of records if necessary Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

22 4. Effective Solutions (cont’d)
Scope of de-duplication Include English e-books and e-theses e-books: 88,000 records e-theses: 70,000 records Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

23 4. Effective Solutions (cont’d)
Scope of de-duplication (cont’d) Exclude Chinese e-books because CityU so far only has one Chinese e-book collection, Apabi. Vendor supplied unique records when we joined the Apabi D-Lib consortium (no duplication with previously purchased titles) We will also handle Chinese e-books if we acquire other Chinese e-book collections in the future Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

24 4. Effective Solutions (cont’d)
What fields to match? E-books Match ISBN – a relatively reliable tag Match major MARC tags – 110 match key UMI e-theses Use UMI number for matching Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

25 4. Effective Solutions (cont’d)
How to merge? Set the one with the earliest Create Date as the master record Add reproduction note (tag 533), name of book collection (tag 773) and URL link (tag 856) of the duplicate record(s) to the master record Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

26 4. Effective Solutions (cont’d)
Matching algorithm of ISBN Print ISBN vs. e-book ISBN Some records come with print ISBN, some with e-book ISBN, some with both Both types are used for matching Different tags to store ISBN 020 $a, $z 024 (1st indicator 3) $a, $z 776 $z All the above are used for matching Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

27 4. Effective Solutions (cont’d)
Matching algorithm of ISBN (cont’d) 13-digit ISBN vs. 10-digit ISBN Starting on 1 Jan 2007, the ISBN is 13-digit Some publishers already used 13-digit ISBN before that Starting from 12 Nov 06, OCLC moves 13-digit ISBN to tag 020 13-digit ISBN with prefix “978” may have 10-digit equivalents, they are converted to 10-digit for matching Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

28 4. Effective Solutions (cont’d)
Matching algorithm of ISBN (cont’d) ISBN with “noise” Some ISBN include a note enclosed in parentheses Do not use ISBN for matching if the text inside the parentheses indicates that the ISBN is for a set, a series, or a volume etc. e.g. “ (series : International library of psychology)” Hints: look for keywords “set”, “series” and compare with Tag 440 and Tag 830 Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

29 4. Effective Solutions (cont’d)
Matching algorithm of the 110 Match Key To guarantee there is no mismatch by ISBN, construct additional match key based on INN-Reach 110 Match Key Title + Gen. Media + Pub. Year + Pagination + Edition + Publisher + Type of Record + Title Part + Title Number Constructed the key and normalized Refer to INN-Reach documentation for details Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

30 5. De-duplication jobs Initial clean-up Regular de-duplication
Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

31 5. De-duplication jobs (cont’d)
Initial clean-up One time -- to de-duplicate records that had been loaded 6,063 (7.2%) duplicate records were found, out of 84,756 English e-book titles Fine tune program after initial clean-up Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

32 5. De-duplication jobs (cont’d)
Regular de-duplication Once every month Flexibility Depends on no. of title loaded & urgency to load the records Clean-up before loading vs. clean-up after loading Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

33 5. De-duplication jobs (cont’d)
Regular de-duplication (cont’d) Procedures Output e-book records from catalogue Run de-duplication program to match with vendor records Overlay records in catalogue with merged records If vendor records have been loaded delete duplicate vendor records from catalogue Else insert new vendor records into catalogue Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

34 5. De-duplication jobs (cont’d)
Flow chart Match & Merge Delete Overlay Master records Vendor records Merged Duplicated New INNOPAC Insert Vendor Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

35 5. De-duplication jobs (cont’d)
De-duplication results Initial clean-up of e-books Total English e-book records 84756 100.0% Records duplicated 6063 7.2% Titles merged from 2 records 3024  99.8% Titles merged from 3 records 5 0.2% Titles merged from >= 4 records  0.0% Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

36 5. De-duplication jobs (cont’d)
De-duplication results Initial clean-up of e-books (cont’d) Distribution of titles merged from 2 records Books24x7 ebrary netLibrary Safari Springer Wiley Total 7 14 4 2842 10 30 51 2 41 11 21 2938 61 3022 (Misc) Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

37 5. De-duplication jobs (cont’d)
De-duplication results Initial clean-up of e-books (cont’d) We found that for the duplicated titles within the same collection, some will direct users to different e-books, this problem is more serious in ebrary. Fine-tune program, add the condition: When two matched records have the same CGI scripts (i.e. belong to the same collection) but different book IDs, do not merge them, but flag for review Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

38 5. De-duplication jobs (cont’d)
De-duplication results (cont’d) Initial clean-up of e-theses Total UMI e-thesis records 66358 100.0% Records duplicated 502 0.76% Titles merged from 2 records 251  100% Titles merged from 3 records 0.0% Titles merged from >= 4 records  0.0% Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

39 5. De-duplication jobs (cont’d)
De-duplication results Initial clean-up of e-theses (cont’d) Distribution of titles merged from 2 records UMI (pdf) DDC ProQuest Total 226 23 2 249 251 (DDC = Digital Dissertation Consortium) More than 4,000 DDC & ProQuest records had been de-duplicated with manual process (using 001 field) before the initial clean-up process. Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

40 6. Benefits and limitations
Single record for all versions of the same e-book or e-thesis titles, maintain integrity in the library catalogue Save much staff time & manual effort Method applicable to other e-resources Management need – generate duplication statistics Can be applied to match existing e-book collections with e-book titles supplied by potential vendors – e-book collection development Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

41 6. Benefits and limitations (cont’d)
Depends on data in vendor-supplied records Incorrect match and merge in case of incorrect or incomplete data Chinese e-book records Brief bibliographic data Lack of standardization in transcription Difficult to construct reliable match-key Sometimes lack of ISBNs Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

42 Maintaining the integrity of e-book titles in CityU library catalogue
Thank You! Joanna Pong Philip Wong Maintaining the intergrity of e-book titles in CityU library catalogue, 7th HKIUG, 2006

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