Analysis Design And Implementation Of Custom Decision Support System Based On Metadata

With the rapid development of information technology and the popularization of the Internet,the information management system has developed steadily.But with the wide application of various systems,more and more data are produced.How to make full use of the data,data analysis and statistics,users can be based on the results of analysis and statistics as the basis for decision-making,so that the data play a role,it has become very important.Decision support system is to solve the problem of data analysis and statistics,the use of database,method library,model library and other methods,so that decision makers get the corresponding decision information.The current decision support system is to design the model for the existing requirements or problems to provide the corresponding methods or algorithms,results,to provide decision support.In practice,there may be some problems or requirements that have not been raised yet,but will be raised in the future.This paper proposes a solution to such a problem.Users can build models,select methods and data according to their own requirements or problems.Users can build models in the model library according to their own needs,select appropriate methods or algorithms and data in the method library,run the model to solve the problem,and modify or combine the existing model in the model library to solve the problem.Users can customize the method library to add some methods of mathematical formula type,which is easy to call later when solving the problem.At the same time,the detailed information of the method can be seen in the method library,so as to select the appropriate method for use.When solving problems or requirements,a large amount of relevant data is needed,which may come from different databases or data tables,etc.,and these data need to be extracted and other operations.Therefore,in this paper,users can connect to other databases,local databases or upload files in the form of a customized access to the required data according to the proposed problems or requirements,and import the data into the customized data table and table fields.The type and format of the required data may vary from database to database from different systems,so the data type or format should be uniformly converted when importing data.In order to better manage data extraction and improve the accuracy of data analysis,we will introduce the concept of metadata.Metadata is the data that describes the data,and it can be normalized to describe the type and format of the data through the mechanism of metadata,so as to realize the effective use of the data.At the same time,different users in the system have different permissions,so administrators can assign permissions according to the type of users.This paper combines metadata,method library and model library to study the custom decision support system based on metadata.This paper adopts the method of combining theoretical discussion with practical projects.Firstly,the theory of decision support system,model base,method base,metadata concept and related development technology are elaborated in detail.Secondly,according to the customized business requirements,the requirements of the system are analyzed,and the overall framework,module functions and data model of the system are designed.Finally,the application of the customized decision support system based on metadata in personnel personnel is explained.At the end of the paper,the work is summarized and the future work is prospected.