Examples of Complex Structural Relationships
Discussion of the procedures for the resolution of overprinted relationships is continued in this chapter by further consideration of structural associations, this time of greater complexity. It begins with a re-examination of some structures already looked at, followed by cases of increasing complexity, and then examines cases of more extensive successions comparable to that comprising the structure seen in Figures 11.1 and 11.2. The approach used in resolving the overprinted relationships is fundamentally the same as before, but the successions determined are ‘formalized’ here with the structure sets listed for the most part in the form of ‘stratigraphical’ columns.
Based on design of databank,we study XML functional dependency.XML functional dependency is presented based on path expression and tree model,and a sound complete set of inference rules of XML functional dependency is given.Implementing of data exchange between heterogeneous databases with XML has important theoretic significance and practical value.