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现有对Web服务自动组合的研究很少考虑信息提供类服务不同于一般服务的特点.文中提出一个简单,但具有明确语义的信息提供类服务功能模型,表达了该类服务不改变世界状态,有些输入输出参数不具有语义类型的特点;然后提出并实现了一个相应的自动组合方法.该方法以数据集成领域中一种查询重写算法MiniCon为基础,充分利用了前述特点,支持最基本的语义推理,能自动生成可直接运行的BPEL脚本.其性能特点与传统的基于搜索过程的方法具有互补性.在一类典型问题上进行的性能测试表明该方法具有相当强的实用价值.
At present, the research on automatic composition of Web services seldom considers the characteristics of information providing services different from general services.In this paper, we propose a simple but clear semantic information service model, which expresses that such services do not change the state of the world, Some input and output parameters do not have the semantic type characteristic.And then a corresponding automatic combination method is proposed and implemented.This method takes MiniCon as a query rewriting algorithm in the field of data integration and makes full use of the above features to support the most basic Semantic reasoning can automatically generate BPEL scripts that can be run directly.The performance characteristics are complementary to the traditional search-process-based methods.Performance testing on a typical type of problem shows that the method has quite strong practical value.