Research On Component Retrieval Technology And Its Application In The Credit-domain Component Library

Software reuse has claimed to be the realistic means to increase the productivity of programmers and improve the quality of developed software. Besides, a well-adapted and reliable credit evaluation system used to evaluate the status of the credit level of enterprises can be developed quickly through the construction of different components, and the cost of the software development can be reduced sharply at the same time. Consequently, how to find the needed components from vast amount of software reusable component library has become the key problem of the development process of credit-evaluation software based on component reuse.The storage, management, retrieval, browses and maintenance of credit component library has been provided, which is the most important infrastructure supporting software reuse. The composition and retrieval of the component library are based on the efficient description of components. Several means to present the evaluation component information has been proposed, based on which the adopted retrieval technology of the evaluation component library has been mainly discussed.This dissertation has done its research on several respects as follows:1. Through analysis of credit evaluation domain based on the advantage and principle of facet classification and domain engineering, a facet classification schema of credit component correspondent to the retrieval characterization has been proposed.2. On the basis of efficient representation of the information of credit components, in conjunction with the technology of tree-match model and hierarchy encoding, the retrieval of component facets is converted to the match between strings to achieve the goal of relaxation matching effect. Through the calculation based of the VSM, the recall has been improved based on the certain level of precision.3. This dissertation has adopted Lucene full text search technology to implement the match of keyword and attribute value for the credit component library. As a result, the efficiency of the retrieval has been greatly improved to satisfy the requirement of multilayer assistant search.4. Based on the above research, this dissertation has implemented the component retrieval system of credit component library, and testifies the feasibility and practicability of the system.Through the discussion of the retrieval technology applied to the credit component library, this dissertation has proposed a good implementation means with good search performance, and facilitate the development of credit evaluation system based on component reuse.