01751nas 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=762148820f31cebc540800656d2bbd38