01371nas a2200181   4500008004100000245006300041210005900104260000900163300001400172490000600186520076800192653002000960653002700980653002101007100002001028700002401048856011701072       2008                        eng d00aThe OntoNL semantic relatedness measure for OWL ontologies0 aOntoNL semantic relatedness measure for OWL ontologies  c2008  a366 - 3740 v63 aAn effect of the growing importance of the Semantic Web used for sharing knowledge over the Internet was the development and publishing of many ontologies in different domains. This led to the need of developing mechanisms for capturing the semantics of the ontologies. In this paper, we introduce the OntoNL Semantic Relatedness Measure, a fully automated way of measuring, in an asymmetric way, semantic relatedness between concepts of domain ontologies. We have developed metrics to guide the automation of the procedure by using feedback from an extensive evaluation with human subjects. We conclude with an application based evaluation using the OntoNL Framework as the application platform, a Natural Language Interface Generator for Knowledge Repositories.10aDomain ontology10aKnowledge Repositories10aOntoNL Framework1 aKaranastasi, A.1 aChristodoulakis, S.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84865464416&partnerID=40&md5=b36024693390715e4aab217ee0f62b1201751nas a2200205   4500008004100000245009600041210006900137260000900206300001400215490000600229520107200235653001101307653001301318653002301331653001401354100001801368700001801386700002401404856011701428       2006                        eng d00aGraphOnto: OWL-based ontology management and multimedia annotation in the DS-MIRF framework0 aGraphOnto OWLbased ontology management and multimedia annotation  c2006  a214 - 2190 v43 aWe present here GraphOnto, a software component and an API that allow the definition and editing of both standard-based and domain OWL ontologies and their use in multimedia information system components. In our working environment an OWL Upper Ontology that captures the MPEG-7 MDS is utilized and OWL domain ontologies extend the upper ontology with domain knowledge. The ontologies imported in GraphOnto are parsed so that graphical ontology browsing and editing interfaces are automatically generated. The ontologies are used to guide the semantic multimedia annotation in a standardized manner. OWL Ontology mappings, expressed using OWL constructs, are supported and allow the definition of personalized ontologies. Personalization of the GraphOnto user interface on the application, task and user levels is provided. In addition, GraphOnto interoperates with an MPEG-7 Repository both for semantic entity reuse during multimedia content annotation and for semantic description storage. GraphOnto has been evaluated against Protégé and clearly outperforms it.10aMPEG 710aOntology10aOntology standards10aSemantics1 aPolydoros, P.1 aTsinaraki, C.1 aChristodoulakis, S.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-33845937025&partnerID=40&md5=b72758db21f6febb306c3712ffb375fb01772nas a2200241   4500008004100000245007800041210006900119260000900188300001400197490000600211520099100217653002001208653002201228653002901250653002501279100001801304700001501322700001801337700001901355700001501374700002401389856011701413       2006                        eng d00aSemantic, constraint & preference based multimedia presentation authoring0 aSemantic constraint preference based multimedia presentation aut  c2006  a207 - 2130 v43 aWe present in this paper an integrated system that allows the management and annotation of multimedia objects stored in MPEG-7/21 repositories, and the specification and semi-automatic generation of multimedia presentations based on the content relationships that exist between the multimedia objects. This system is the outcome of the collaboration between the Technical University of Crete (TUC-MUSIC) and the University of Milan (UNIMI) in the CoCoMA (Content and Context Aware Multimedia Content Retrieval, Delivery and Presentation) project of the DELOS II European Network of Excellence on Digital Libraries. The resulting system is one of the main components of the CoCoMA infrastructure that aims to provide content- and context-aware rich interactive multimedia presentations by controlling data fusion and metadata reuse. The integrated system utilizes the SyMPA management and presentation authoring system developed by UNIMI and the DS-MIRF framework developed by TUC-MUSIC.10aAuthoring tools10aDigital libraries10aMultimedia presentations10aMultimedia standards1 aTsinaraki, C.1 aPerego, A.1 aPolydoros, P.1 aSyntzanaki, A.1 aMartin, A.1 aChristodoulakis, S.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-33845937945&partnerID=40&md5=762148820f31cebc540800656d2bbd3801471nas a2200205   4500008004100000245014500041210006900186260000900255300001400264490000600278520073700284653001101021653003101032653001301063653001401076100002001090700001401110700002401124856011701148       2006                        eng d00aUser interactions with multimedia repositories using natural language interfaces - OntoNL: An architectural framework and its implementation0 aUser interactions with multimedia repositories using natural lan  c2006  a220 - 2260 v43 aWe present a generalized architectural framework for constructing and using natural language interfaces for interactions with multimedia repositories. The system allows the users to specify natural language queries about the multimedia content with rich semantics. It uses an extensive set of methodologies and tools for linguistic processing, and utilizes the MPEG-7 and the domain ontologies to reduce the ambiguities in the natural language and to rank the results. We describe the implementation of this framework for supporting interactions with a multimedia repository, described with the MPEG-7 MDS (Multimedia Description Schemes) structures, that also uses User Profile information for better ranking of the result queries.10aMPEG 710aNatural language interface10aOntology10aSemantics1 aKaranastasi, A.1 aZotos, A.1 aChristodoulakis, S.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-33845925229&partnerID=40&md5=78be53ce109a805416d2c49e78d10de5