Author, as appears in the article.: Gibert, K. Valls, A. Batet, M.
Department: Enginyeria Informàtica i Matemàtiques
e-ISSN: 0219-3116
Abstract: Today, it is well known that taking into account the semantic information available for categorical variables sensibly improves the meaningfulness of the final results of any analysis. The paper presents a generalization of mixed Gibert¿s metrics, which originally handled numerical and categorical variables, to include also semantic variables. Semantic variables are defined as categorical variables related to a reference ontology (ontologies are formal structures to model semantic relationships between the concepts of a certain domain). The superconcept-based distance (SCD) is introduced to compare semantic variables taking into account the information provided by the reference ontology. A benchmark shows the good performance of SCD with respect to other proposals, taken from the literature, to compare semantic features. Mixed Gibert¿s metrics is generalized incorporating SCD. Finally, two real applications based on touristic data show the impact of the generalized Gibert¿s metrics in clustering procedures and, in consequence, the impact of taking into account the reference ontology in clustering. The main conclusion is that the reference ontology, when available, can sensibly improve the meaningfulness of the final clusters.
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0219-1377
Last page: 593
Journal volume: 40
Papper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Entity: Universitat Rovira i Virgili.
Journal publication year: 2014
First page: 559
Repositori URV