A Fuzzy-Based Broken Schema Mapping Detecting Approach

In the dynamic distributed environment, the data sources trend to suffer changes that invalidate the mappings. We put forward a Fuzzy-based Broken Schema Mapping Detecting Approach (BSMD) to process the run time broken mapping detecting problem. The core of BSMD is a set of computationally inexpensive modules called sensors, which capture salient characteristics of data sources. There are two novel improvements: Disjunction-Weighted Average Operators are leveraged to calculate the score, which implies whether the mapping is broken; Change Weight Operators is introduced combine artificial data with real data in the training phase. The experiments over the real-world sources demonstrate the effectiveness of our fuzzy-based approach over existing solutions, as well as the utility of our improvements.