TY - CONF AU - Yang, Hui AU - Callan, Jamie A2 - T1 - A Metric-based Framework for Automatic Taxonomy Induction T2 - Proceedings of the 47th Annual Meeting of the Association for Computational Linguistics (ACL2009) PB - C1 - Singapore PY - 2009/08 CY - VL - IS - SP - EP - UR - DO - KW - genta11 KW - taxonomy_learning L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Chavalarias, David AU - Cointet, Jean-Philippe T1 - Bottom-up scientific field detection for dynamical and hierarchical science mapping, methodology and case study JO - Scientometrics PY - 2008/04 VL - 75 IS - 1 SP - 37 EP - 50 UR - http://dx.doi.org/10.1007/s11192-007-1825-6 DO - KW - scientific_disciplines KW - toread KW - taxonomy_learning L1 - SN - N1 - SpringerLink - Journal Article N1 - AB - Abstract  We propose new methods to detect paradigmatic fields through simple statistics over a scientific content database. We proposean asymmetric paradigmatic proximity metric between terms which provide insight into hierarchical structure of scientific activity and test our methods on a case studywith a database made of several millions of resources. We also propose overlapping categorization to describe paradigmaticfields as sets of terms that may have several different usages. Terms can also be dynamically clustered providing a high-leveldescription of the evolution of the paradigmatic fields. ER - TY - JOUR AU - Cimiano, P. AU - Hotho, A. AU - Staab, S. T1 - Learning Concept Hierarchies from Text Corpora using Formal Concept Analysis JO - Journal of Artificial Intelligence Research PY - 2005/ VL - 24 IS - 1 SP - 305 EP - 339 UR - http://ontology.csse.uwa.edu.au/reference/browse_paper.php?pid=233281549 DO - KW - fca KW - ol_web2.0 KW - ontology_learning KW - taxonomy_learning L1 - SN - N1 - N1 - AB - ER - TY - CHAP AU - Cimiano, P. AU - Schmidt-Thieme, L. AU - Pivk, A. AU - Staab, S. A2 - Buitelaar, P. A2 - Cimiano, P. A2 - Magnini, B. T1 - Learning Taxonomic Relations from Heterogeneous Evidence T2 - Ontology Learning from Text: Methods, Applications and Evaluation PB - IOS Press C1 - PY - 2005/ VL - IS - 123 SP - 59 EP - 73 UR - http://www.aifb.uni-karlsruhe.de/Publikationen/showPublikation_english?publ_id=746 DO - KW - evidence KW - heterogeneous KW - ol_web2.0 KW - taxonomy_learning L1 - SN - N1 - N1 - AB - ER - TY - CONF AU - Dupret, Georges AU - Piwowarski, Benjamin A2 - T1 - Deducing a Term Taxonomy from Term Similarities T2 - ECML/PKDD 2005 Workshop on Knowledge Discovery and Ontologies PB - C1 - PY - 2005/ CY - VL - IS - SP - EP - UR - DO - KW - ol_web2.0 KW - taxonomy_learning KW - methods_concepthierarchy L1 - SN - N1 - N1 - AB - We show that the singular value decomposition of a term similarity matrix induces a term taxonomy. This decomposition, used in Latent Semantic Analysis and Principal Component Analysis for text, aims at identifying “concepts�? that can be used in place of the terms appearing in the documents. Unlike terms, concepts are by construction uncorrelated and hence are less sensitive to the particular vocabulary used in documents. In this work, we explore the relation between terms and concepts and show that for each term there exists a latent subspace dimension for which the term coincides with a concept. By varying the number of dimensions, terms similar but more specific than the concept can be identified, leading to a term taxonomy. ER - TY - CHAP AU - Cimiano, P. AU - Schmidt-Thieme, L. AU - Pivk, A. AU - Staab, S. A2 - Buitelaar, P. A2 - Cimiano, P. A2 - Magnini, B. T1 - Learning Taxonomic Relations from Heterogeneous Evidence T2 - Ontology Learning from Text: Methods, Applications and Evaluation PB - IOS Press C1 - PY - 2004/ VL - IS - 123 SP - 59 EP - 73 UR - http://www.aifb.uni-karlsruhe.de/Publikationen/showPublikation_english?publ_id=746 DO - KW - evidence KW - heterogeneous KW - ol_web2.0 KW - taxonomy_learning KW - methods_concepthierarchy L1 - SN - N1 - N1 - AB - We present a novel approach to the automatic acquisition of taxonomic relations. The main difference to earlier approaches is that we do not only consider one single source of evidence, i.e. a specific algorithm or approach, but examine the possibility of learning taxonomic relations by considering various and heterogeneous forms of evidence. In particular, we derive these different evidences by using well-known NLP techniques and resources and combine them via two simple strategies. Our approach shows very promising results compared to other results from the literature. The main aim of the work presented in this paper is (i) to gain insight into the behaviour of different approaches to learn taxonomic relations, (ii) to provide a first step towards combining these different approaches, and (iii) to establish a baseline for further research. ER - TY - CONF AU - Cimiano, Philipp AU - Hotho, Andreas AU - Staab, Steffen A2 - de Mántaras, R. López A2 - Saitta, L. T1 - Comparing Conceptual, Divise and Agglomerative Clustering for Learning Taxonomies from Text T2 - ECAI 2004 Proceedings of the 16th European Conference on Artificial Intelligence, 22 - 27 August, Valencia, Spain PB - IOS Press C1 - PY - 2004/ CY - VL - IS - SP - 435 EP - 439 UR - DO - KW - clustering KW - ol_web2.0 KW - ontology_learning KW - taxonomy_learning KW - methods_from_text L1 - SN - N1 - N1 - AB - The application of clustering methods for automatic taxonomy construction from text requires knowledge about the tradeoff between, (i), their effectiveness (quality of result), (ii), efficiency (run-time behaviour), and, (iii), traceability of the taxonomy construction by the ontology engineer. In this line, we present an original conceptual clustering method based on Formal Concept Analysis for automatic taxonomy construction and compare it with hierarchical agglomerative clustering and hierarchical divisive clustering. ER -