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The size of the gap between source model and target model has a profound impact on the efforts to create mapping rules in model-driven development. Starting from the analysis of semantic consistency requirement of model transformation, a semantics-reconstruction based model mapping approach for web information system development was proposed by abstractly analyzing the syntactic structure and semantic features of modeling languages. Target semantic model is used as an intermediary for disambiguation, and which provides a good basis for the semantic comparison between modeling elements at different abstract levels. This approach can provide an effective support for model driven development because semantic consistency between different level descriptions of the same component model can be ensured. J2EE is used as a target platform to help interpreting the process of using the approach.