TY - CHAP
T1 - Ontology based information extraction from text
AU - Karkaletsis, Vangelis
AU - Fragkou, Pavlina
AU - Petasis, Georgios
AU - Iosif, Elias
PY - 2011
Y1 - 2011
N2 - Information extraction systems employ ontologies as a means to describe formally the domain knowledge exploited by these systems for their operation. The aim of this survey is to study the contribution of ontologies to information extraction systems. We believe that this will help towards specifying a concrete methodology for ontology based information extraction exploiting all levels of ontological knowledge, from domain entities for named entity recognition, to the use of conceptual hierarchies for pattern generalization, to the use of properties and non-taxonomic relations for pattern acquisition, and finally to the use of the domain model itself for integrating extracted entities and instances of relations, as well as for discovering implicit information and detecting inconsistencies.
AB - Information extraction systems employ ontologies as a means to describe formally the domain knowledge exploited by these systems for their operation. The aim of this survey is to study the contribution of ontologies to information extraction systems. We believe that this will help towards specifying a concrete methodology for ontology based information extraction exploiting all levels of ontological knowledge, from domain entities for named entity recognition, to the use of conceptual hierarchies for pattern generalization, to the use of properties and non-taxonomic relations for pattern acquisition, and finally to the use of the domain model itself for integrating extracted entities and instances of relations, as well as for discovering implicit information and detecting inconsistencies.
UR - http://www.scopus.com/inward/record.url?scp=79955812222&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-20795-2_4
DO - 10.1007/978-3-642-20795-2_4
M3 - Chapter
AN - SCOPUS:79955812222
SN - 9783642207945
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 89
EP - 109
BT - Knowledge-Driven Multimedia Information Extraction and Ontology Evolution
A2 - Paliouras, Georgios
A2 - Spyropoulos, Constantine
A2 - Tsatsaronis, George
ER -