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Baum, Kempf: Thesaurus based indexing
 

Baum, Kempf: Thesaurus based indexing

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Thesaurus-Based Indexing of Research Data in the Social Sciences Opportunities and Difficulties of Internationalization Efforts ...

Thesaurus-Based Indexing of Research Data in the Social Sciences Opportunities and Difficulties of Internationalization Efforts

Contents:
- Current Trends and Demands in Describing and Cataloguing Research Data
- Subject Indexing of Research Data in the Social Sciences (Present Situation in Europe)
- Thesauri in Subject Indexing
- Recommended Indexing Model
- Retrieval Model
- Practical Aspects

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    Baum, Kempf: Thesaurus based indexing Baum, Kempf: Thesaurus based indexing Presentation Transcript

    • Thesaurus-Based Indexing of ResearchData in the Social SciencesOpportunities and Difficultiesof Internationalization EffortsKatrin Baum, Dipl.-Bibl.Dr. Andreas Oskar Kempf, M.A. (LIS)GESIS – Leibniz-Institute for the Social SciencesCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data
    • Contents1. Current Trends and Demands in Describing and Cataloguing ResearchData2. Subject Indexing of Research Data in the Social Sciences – PresentSituation in Europe3. Thesauri in Subject Indexing4. Recommended Indexing Model5. Retrieval Model6. Practical AspectsCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 2
    • 1. Current Trends and Demandsin Describing and Cataloguing Research DataIncreasing internationalization and standardization efforts: to enable and facilitate data exchange to enable and facilitate integrated retrieval across distributedinformation systemsIn the social sciences: DDI (e.g. metadata specification, controlled vocabularies) Commonly used systems for subject indexing (e.g. ELSST,CESSDA Topic Classification) …Cologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 3
    • 2. Subject Indexing of Research Data in the SocialSciences – Present Situation in Europe (1/5)CESSDA (Council of European Social Science Data Archives): Members = data archives and other organisations all acrossEurope which archive and provide social science data forsecondary use Provides access to 25,000 data collections + 1,000 datacollections every year Development and maintenance of European Language SocialScience Thesaurus (ELSST) and CESSDA Topic Classification CESSDA catalogue: allows search in data collections ofmember organisations, e.g. search by topic or search bykeywordCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 4
    • 2. Subject Indexing of Research Data in the SocialSciences in Europe – Present Situation (2/5)Cologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 5
    • 2. Subject Indexing of Research Data in the SocialSciences in Europe – Present Situation (3/5)European Language Social Science Thesaurus (ELSST): Multilingual thesaurus for the social sciences (translated into English,Danish, Finnish, French, German, Greek, Norwegian, Spanish andSwedish) Based on the HASSET Thesaurus of UKDA Further developed by CESSDA members Planned: annual release of new version (latest version: 3/2013) Contains about 3,300 internationally applicable concepts extractedfrom HASSET Allows for local extensions of concepts Used for subject indexing of research data by CESSDA membersCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 6
    • 2. Subject Indexing of Research Data in the SocialSciences in Europe – Present Situation (4/5)Cologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 7
    • 2. Subject Indexing of Research Data in the Social Sciencesin Europe – Present Situation (5/5)But: No coherent indexing practice throughout the participatingarchives due to a lack of a binding indexing policy Limited representation of fine-grained national / local issues(e.g. historical, juridical, religious and political aspects, formsof national organizations, educational system, collection-specific aspects …) Retrieval limited to internationally applicable conceptsCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 8
    • 3. Thesauri in Subject Indexing (1/3)Some general findings on thesauri: Scope and content of each thesaurus is tightlyconnected to a specific collection => scope and contentof thesauri of the same domain can differ Different levels of abstraction / specificity Different perspectives / classification aspects can lead todifferent semantic relationsCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of ResearchData9
    • 3.1 Thesauri in Subject Indexing - Internationallyusable Thesauri (2/3)Internationally usable thesaurus has to: represent concepts that exist in any language display these concepts in a hierarchical / semantic structurethat fits all languages be free of any bias be multilingualBut: Fine-grained local issues cannot be displayed Retrieval limited to internationally applicable conceptsCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of ResearchData10
    • 3.2 Thesauri in Subject Indexing - Local Thesauri (3/3)Exclusive use of a local indexing system: Represents scope of local collection Respects local aspects Allows for more precise indexing Easier to maintain Monolingual or multilingual access to local collectionBut: No access to dispersed collections that are indexed withdifferent terminological resourcesCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 11
    • = Aggregate of local thesauri with common, internationallyapplicable core conceptsCore: Contains concepts that exist in any language Hierarchical structure fits all languages Free of bias Concepts that are already part of the local systemscan be mapped to concepts of core system Concepts that are still missing in local systemscan be added4. Recommended Indexing Model (1/3)Cologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 12
    • 4. Recommended Indexing Model (2/3)Cologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 13ELSST(CESSDACATALOGUE)TheSoz(GESIS)Universal Core Indexing Systemcontains central concepts which existin any language(e.g. SECONDARY SCHOOLS)contains central concepts whichalready exist in local indexing systems(e.g. WEITERFÜHRENDE SCHULEN)Local Indexing System:contains local specificities(e.g. GYMNASIUM)contains collection-specific concepts(e.g. NORDRHEIN-WESTFALEN)HASSET(UKDA)
    • 4. Recommended Indexing Model (3/3)SECONDARY SCHOOLS > GYMNASIUM SECONDARYSCHOOL(Gymnasium)GYMNASESECONDARY SCHOOLS > REALSCHULE INTERMEDIATESCHOOLÉCOLE SECONDAIREPRATIQUESECONDARY SCHOOLS > HAUPTSCHULE SECONDARYMODERN SCHOOLÉCOLE SECONDAIREOBLIGATOIRECologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data14Thesaurus Cross-ConcordancesELSST(D, DK, E, FIN, F, GB, GR, N, S)Relation TheSoz(D, GB, F)SECONDARY SCHOOLS = WEITERFÜHRENDESCHULESECONDARYSCHOOLÉCOLE SECONDAIRELinkage between International Core and Local IndexingSystem
    • 5. Retrieval ModelCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 15„schools“„Schulen“„écoles“„colegios“„koulut“„skole“„ΣΧΟΛΕΙΑ“„skola“„skoler“IntegratedRetrieval System(e.g. CESSDACatalogue)ELSSTPreferred Term:SCHOOLSNarrower Terms:- SECONDARYSCHOOLS- WEITERFÜHREDESCHULE- … Narrower Terms:> SECONDARY SCHOOL(GYMNASIUM)- GYMNASIUM> INTERMEDIATESCHOOL- REALSCHULE> SECONDARY MODERNSCHOOL- Hauptschule=TheSoz- SECONDARYSCHOOLS- WEITERFÜHRENDESCHULEInternational Indexing System Local Indexing System
    • 6. Practical Aspects Need for binding indexing guidelines for core terms Data already indexed with local system remain useful User only needs to know one thesaurus Local system represents local collection Indexing with local system guarantees a more preciseindexing and respects local aspects Local systems are easier to maintainCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 16
    • Thank youfor your attention.ContactKatrin BaumGESIS-Leibniz-Institute for the Social Scienceskatrin.baum@gesis.orgDr. Andreas Oskar KempfGESIS – Leibniz-Institute for the Social Sciencesandreas.kempf@gesis.orgwww.gesis.orgCologne, May 28 – 31 May │ Baum, Kempf │ IASSIST 2013 │ Thesaurus-Based Indexing of Research Data 17