DIRT @SBT@discovery of inference rules from text
Proceedings of the seventh ACM SIGKDD international conference on Knowledge discovery and data mining
Formal Concept Analysis: Mathematical Foundations
Formal Concept Analysis: Mathematical Foundations
A Formal Ontology of Properties
EKAW '00 Proceedings of the 12th European Workshop on Knowledge Acquisition, Modeling and Management
The description logic handbook: theory, implementation, and applications
The description logic handbook: theory, implementation, and applications
Extracting semantic hierarchies from a large on-line dictionary
ACL '85 Proceedings of the 23rd annual meeting on Association for Computational Linguistics
Is there content in empty heads?
COLING '90 Proceedings of the 13th conference on Computational linguistics - Volume 3
Automatic acquisition of hyponyms from large text corpora
COLING '92 Proceedings of the 14th conference on Computational linguistics - Volume 2
Extending metadata definitions by automatically extracting and organizing glossary definitions
dg.o '03 Proceedings of the 2003 annual national conference on Digital government research
Ontology Learning and Population from Text: Algorithms, Evaluation and Applications
Ontology Learning and Population from Text: Algorithms, Evaluation and Applications
ESWC '07 Proceedings of the 4th European conference on The Semantic Web: Research and Applications
KRAQ '06 Proceedings of the Workshop KRAQ'06 on Knowledge and Reasoning for Language Processing
Querying ontologies: a controlled english interface for end-users
ISWC'05 Proceedings of the 4th international conference on The Semantic Web
Automatic evaluation of ontologies (AEON)
ISWC'05 Proceedings of the 4th international conference on The Semantic Web
NLDB'05 Proceedings of the 10th international conference on Natural Language Processing and Information Systems
Debugging and semantic clarification by pinpointing
ESWC'05 Proceedings of the Second European conference on The Semantic Web: research and Applications
ILP meets knowledge engineering: a case study
ILP'05 Proceedings of the 15th international conference on Inductive Logic Programming
Supporting Lexical Ontology Learning by Relational Exploration
ICCS '07 Proceedings of the 15th international conference on Conceptual Structures: Knowledge Architectures for Smart Applications
Fostering Web Intelligence by Semi-automatic OWL Ontology Refinement
WI-IAT '08 Proceedings of the 2008 IEEE/WIC/ACM International Conference on Web Intelligence and Intelligent Agent Technology - Volume 01
A system for debugging missing is-a structure in networked ontologies
DILS'10 Proceedings of the 7th international conference on Data integration in the life sciences
Discovery of relation axioms from the web
KSEM'10 Proceedings of the 4th international conference on Knowledge science, engineering and management
ORE - a tool for repairing and enriching knowledge bases
ISWC'10 Proceedings of the 9th international semantic web conference on The semantic web - Volume Part II
Formalising and specifying underquantification
IWCS '11 Proceedings of the Ninth International Conference on Computational Semantics
Learning relation axioms from text: An automatic Web-based approach
Expert Systems with Applications: An International Journal
The semantic gap of formalized meaning
ESWC'10 Proceedings of the 7th international conference on The Semantic Web: research and Applications - Volume Part II
Debugging the missing is-a structure of networked ontologies
ESWC'10 Proceedings of the 7th international conference on The Semantic Web: research and Applications - Volume Part II
Knowledge extraction from structured sources
Search Computing
Journal of Web Engineering
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State-of-the-art research on automated learning of ontologies from text currently focuses on inexpressive ontologies. The acquisition of complex axioms involving logical connectives, role restrictions, and other expressive features of the Web Ontology Language OWL remains largely unexplored. In this paper, we present a method and implementation for enriching inexpressive OWL ontologies with expressive axioms which is based on a deep syntactic analysis of natural language definitions. We argue that it can serve as a core for a semi-automatic ontology engineering process supported by a methodology that integrates methods for both ontology learning and evaluation. The feasibility of our approach is demonstrated by generating complex class descriptions from Wikipedia definitions and from a fishery glossary provided by the Food and Agriculture Organization of the United Nations.