Indexing KOSs in BARTOC by a disciplinary and a …seminar.udcc.org/2017/files/ALedl_CGnoli_UDCSeminar2017_slides.pdf · Indexing KOSs in BARTOC by a disciplinary and a phenomenon-based

Indexing KOSs in BARTOC by a disciplinary and a phenomenon-based classification: preliminary considerationsAndreas Ledl & Claudio Gnoli, 14.09.2017

BARTOC.org

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https://bartoc.org/node/496

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BARTOC.org

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Only first three levels of DDC are used

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Integrative Levels Classification (ILC)

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Experimental classification system Listing phenomena instead of disciplines Faceted Started in 2004 as an international research project

Research Interest

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How does a phenomenon-based classification system perform as compared to a disciplinary one?

No substantial data available …

BARTOC is a good opportunity to index the same items by disciplinary DDC and phenomenon-based ILC:

It has general coverage (000-999 = a-z) Most items are not very specialized

Applying ILC in BARTOC

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ILC is maintained as a MySQL database Only the basic database fields for notation, captions and synonyms have been

used for this project Exported in a csv file (6,456 records)

Taxonomy CSV import/export

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Reorganizing the hierarchical structure of ILC

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LOD / SKOS

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https://bartoc.org/en/node/472/visual

https://www.w3.org/2012/pyRdfa/Overview.html

Top-rated KOSs

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https://bartoc.org/ilc

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Results for “j: land”

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ILC Search facet

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At first, only basic ILC classes were imported but it turned out that some concepts expressed as facets are also needed:

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«diseases» is a facet of «organisms» «law» is a facet of «governments»

so these were added manually

Examples

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Thesaurus of European Education Systems

DDC: 379 940 ‘Public policy issues in education; History of Europe’

ILC: se tUE ‘schools; European Union’

CERL Thesaurus

DDC: 094 911 940 ‘Printed books; Historical geography; History of Europe’

ILC: js wl r55n yu ‘landforms; settlements; noun; humanities’

Preliminary results

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Free combination of ILC or DDC classes covers subjects with similar accuracy

Trees of classes are arranged differently:

ILC scatters disciplines

DDC scatters phenomena

Thank youfor your attention.