Conceptual Modeling of Events in Real World Database

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Real world database incorporates data about all aspects of the real world. The data is stored in the database directly, in the format, size, and quantity it is captured. Subsequently, it is analyzed and modeling is perfomed of those aspects of the real world the users are interested in. Such data are multimedia in their nature. When considering the "real world", recognizing the changes in it, i.e. the things which happen, is of great importance. It even can be said we perceive the world around through the changes we observe in it. On the other hand, some media also have "dynamic" characteristics which offer new possibilities and impose new requirements on the database systems. For instance, if we consider a video movie, in addition to the data contained in each frame (i.e. "static" data) there is also data retrievable only if the frames are considered as a sequence, when the movie is played. This data carry information about what is happening, about the events included in the movie. We offer a model for reconizing and manipulating such information. For the purpose of recognition, some supporting knowledge is necessary. We offer a set of descriptions of events in the way they usually happen or in the way they are expected to happen. We call them model events. On the other hand, in reality the way events occur quite often differs more or less from the models. Occurred events are stored in the database as event instances. Each instance can refer to one or more model events which represent its meanings.
一般社団法人情報処理学会の論文
1997-09-24

Conceptual Modeling of Events in Real World Database

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