towards an integrated framework for querying collection of heterogeneous data
Keywords queries on various data models have been studied in the past. Regardless of the nature of target data, a keyword query poses a common problem: the difficulty in determining a suitable retrieval unit. In this paper, we discuss this problem in a new scenario that assumes several different types of data being stored and queried in a unified framework. A hypothetical general query model that borrows the ideas of our previous model designed for XML and linear video data is presented. We then state the requirements and challenges to realize such a model.
retrieval unit algebraic query model query optimization anti-monotonic filters graph data structure information unit minimality