Aligning Controlled vocabularies for enabling semantic matching in a distributed knowledge management system

Morshed, Ahsan (2010) Aligning Controlled vocabularies for enabling semantic matching in a distributed knowledge management system. PhD thesis, University of Trento.

PDF - Doctoral Thesis


The underlying idea of the Semantic Web is that web content should be expressed not only in natural language but also in a language that can be unambiguously understood, interpreted and used by software agents, thus permitting them to find, share and integrate information more easily. The central notion of the Semantic Web's syntax are ontologies, shared vocabularies providing taxonomies of concepts, objects and relationships between them, which describe particular domains of knowledge. A vocabulary stores words, synonyms, word sense definitions (i.e. glosses), relations between word senses and concepts; such a vocabulary is generally referred to as the Controlled Vocabulary (CV) if choice or selection of terms are done by domain specialists. A facet is a distinct and dimensional feature of a concept or a term that allows a taxonomy, ontology or CV to be viewed or ordered in multiple ways, rather than in a single way. The facet is clearly defined, mutually exclusive, and composed of collectively exhaustive properties or characteristics of a domain. For example, a collection of rice might be represented using a name facet, place facet etc. This thesis presents a methodology for producing mappings between Controlled Vocabularies, based on a technique called \Hidden Semantic Matching". The \Hidden" word stands for it not relying on any sort of externally provided background knowledge. The sole exploited knowledge comes from the \semantic context" of the same CVs which are being matched. We build a facet for each concept of these CVs, considering more general concepts (broader terms), less general concepts (narrow terms) or related concepts (related terms).Together these form a concept facet (CF) which is then used to boost the matching process.

Item Type:Doctoral Thesis (PhD)
Doctoral School:Information and Communication Technology
PhD Cycle:XX
Subjects:Area 01 - Scienze matematiche e informatiche > INF/01 INFORMATICA
Area 01 - Scienze matematiche e informatiche > MAT/01 LOGICA MATEMATICA
Additional Information:The majority of this work was done under the supervision of the FAO and the CABI
Funders:University of Trento
Repository Staff approval on:04 May 2010 11:50

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