theoretical knowledge at the same time so that students learn to master the open source development model, understanding, and open source culture. 江波：我觉得这个数字分布只能体现出我们问卷覆盖的人群中，学生占比相对比较大（毕 竟样本数量只有 500 多 maintainability, in order to achieve differentiated competitive advantage. A healthier procurement model for open source products should balance product metrics, technical competitiveness, and maintainability gradually increased in the domestic developer community and among investors. The unique development model of open source has created substantial potential business value, attracting developers, technology

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.5. Data Model Library. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Web MVC Framework The lowest or most foundational part of Apache OFBiz is a classical web MVC (Model View Controller) framework. This part of the system is designed for basic routing of web requests platform independence and customizability. 1.2.5. Data Model Library Apache OFBiz is heavily inspired by a book called the "The Data Model Resource Book". This book provides a "A Library of Universal

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2.5. Data Model Library. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Web MVC Framework The lowest or most foundational part of Apache OFBiz is a classical web MVC (Model View Controller) framework. This part of the system is designed for basic routing of web requests platform independence and customizability. 1.2.5. Data Model Library Apache OFBiz is heavily inspired by a book called the "The Data Model Resource Book". This book provides a "A Library of Universal

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.5. Data Model Library. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 13.5. HR Data model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 Appendix A: HR Data Model Resource Book Difference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.9. Data Model Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A data model shared across most businesses defining things like orders, invoices, general ledgers, customers and so on. • A library of services that operate on the above mentioned data model such as allow users to interact with the system. These applications usually operate on the existing data model and service library. Examples include the "Accounting Manager" and "Order Manager". • A collection

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.9. Data Model Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A data model shared across most businesses defining things like orders, invoices, general ledgers, customers and so on. • A library of services that operate on the above mentioned data model such as allow users to interact with the system. These applications usually operate on the existing data model and service library. Examples include the "Accounting Manager" and "Order Manager". • A collection

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.5. Data Model Library. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 7.5.3. Request Data model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231 12.6. HR Data model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.5. Data Model Library. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 7.5.3. Request Data model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228 12.6. HR Data model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.9. Data Model Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A data model shared across most businesses defining things like orders, invoices, general ledgers, customers and so on. • A library of services that operate on the above mentioned data model such as allow users to interact with the system. These applications usually operate on the existing data model and service library. Examples include the "Accounting Manager" and "Order Manager". • A collection

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.5. Data Model Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A data model shared across most businesses defining things like orders, invoices, general ledgers, customers and so on. • A library of services that operate on the above mentioned data model such as allow users to interact with the system. These applications usually operate on the existing data model and service library. Examples include the "Accounting Manager" and "Order Manager". • A collection