Nowadays, digital video data is increasingly available for public accesses. However, the rate atrnwhich access to this key element of multimedia computing is growing is unparalleled with therntools and techniques that have been developed for retrieving and browsing it. In recent years, arnlot of research efforts have been put into video data management, amongst other active researchrntopics, video data modeling has been extensively researched, but nearly no work has been donernin the area of video data modeling that reveals the role of metadata in enhancing video retrievalrnsystems, and only little work has been done in the area of video data repository modeling. Inrnmany cases the motivation of the research efforts has been the accessibility problem.rnIn this thesis, a video data model with two separate representation schemes is proposed. Thernproposed video data model distinguishes three parts: the frame-based scheme, the object-basedrnscheme and the external description block. We focus our attention on the frame-based schemernand the external description block. In addition, a video data repository model that can bernconveniently used under OR-DBMSs environment is proposed. On the basis of the proposedrnvideo data repository models, a similarity-based video retrieval technique in the context of ORDBMSrnis also proposed.rnIn an effort towards the design of effective and interoperable video retrieval systems, standardsrnplay a major role, in this thesis through the video data model we proposed the benefits of MPEG-rn7 are directed to reach OR-DBMSs. Furthermore, to demonstrate the practicality of our proposalsrna prototype system for a soccer application domain which is called SVAMS is developed.rnKey words: Video data model, Video data repository model, Frame-based representation,rnObject-based representation, Video databases, Similarity-based video retrieval