TY - THES TI - Ontology Based Query Expansion – Retrieval Support for the Domain of Educational Research AU - Carstens, Carola CY - PB - PY - 2011 PY - 2011 LA - English KW - Online-Ressource KW - Information-Retrieval-System KW - Semantic Web KW - Ontologie KW - Wissensbasis KW - Thesaurus KW - Abfrage UR - http://nbn-resolving.de/urn:nbn:de:gbv:hil2-opus-1567 UR - https://katalog.ub.uni-leipzig.de/Record/0-684221853 ER -