Post on 27-Mar-2015
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Federica ParadisiItalian National Bibliography
Classification and Indexing DivisionNational Central Library of Florence (Italy)
Linking DDC numbers to the new ‘Soggettario Italiano’
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The Prototype of the new Soggettario
October 2004: initial stage Work on the controlled vocabulary and
on the creation of the Thesaurus Completion expected by October 2006 Adoption of the open source software
produced by the FAO for the development and maintenance of its AGROVOC Thesaurus: versatility and ability for creating term equivalents in different languages
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The method choicesThe method choices
Compliance with the ISO 2788 standard, also taking in account the more recent proposals such as the British standard 8723 draft and the ANSI/NISO Z39.19 (2005)
Adoption of facet analysis method
Clear distinction between semantic and syntactic relationships
Abandon the “main heading/subdivision” approach and adoption a thesaurus of equally important terms, usable in any syntactic combination within subject strings
Use of syntactic role analysis in building subject strings
Adoption of an indexing system orientated to producing specific coextensive strings and defining rules for citation order.
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The system’s architecture the rules governing vocabulary and syntax in
compliance with the international standards a body of instructions, consisting of syntactic
notes connected to some categories of terms a monolingual and multidisciplinary
Thesaurus, comprising about 13.000 terms the subject strings file
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Categorization of terms
Categories FacetsAgents
Organisms Organizations
Persons and Groups of persons Actions Activities
Disciplines
Processes
Things Forms Instruments Materials
Objects Space
Structures
TimeTime
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The basic requirementsThe basic requirements
To review and implement the old Soggettario’s terms, according to the three-relationship model of thesauri
To have a monolingual Thesaurus, with the possibility of a multilingual development
To create a national tool, dedicated to both general and specialized libraries
To ensure its application in the indexing of various non-book materials
To ensure cooperation
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Links between the preferred terms of the new ‘Soggettario’ and the DDC numbers
interdisciplinary number provided in the Relative Index or the comprehensive number provided in the schedules when the former is not available
the notation should be as full as possible and built up if necessary
when no interdisciplinary number is provided in the Relative Index or the comprehensive number is not available in the schedules for a term which is however provided in the Index, followed by a single disciplinary subentry, this term should be assigned the number corresponding to that subentry, e.g. Anestetics
Pharmacokinetics 615.781
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Links between the preferred terms of the new ‘Soggettario’ and the DDC numbers
Should there be no literary warrant prevailing and should the BNI have assigned more than one classification number belonging to various disciplines, without anyone prevailing, select the classification number corresponding to the semantic category assigned to the terms
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Links between the preferred terms of the new ‘Soggettario’ and the DDC numbers
Problems arisen from this work Consistency between the semantic aspect of the
preferred terms and their different meaning in the DDC
How to integrate the facet analysis used to categorize terms with the disciplinary logic of the DDC
The structure of the Thesaurus has been given the definition of “moderate polyhierarchy”, that is, tending to a monohierarchical structure
Interdisciplinary or comprehensive treatment of each concept: missing other information dealing with the concept within specific disciplines
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Links between the DDC vocabulary and the Prototypal Thesaurus
synonyms and morphological variants found in DDC schedules, Relative Index or Tables for Thesaurus preferred terms have to be linked with an equivalence relationship
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Linking DDC numbers to the new Soggettario italiano
Thanks for your attention federica.paradisi@bncf.firenze.sbn.
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