这里很详细的介绍了ＥＸＴ中的常用组件，代码前台与后台的也十分完善。尤其是对树Ｔｒｅｅ与表格Ｇｒｉｄ组件的描述，而且在此基础上添加了很多很强大的功能。

The European Grid Infrastructure provides a sustainable foundation to the evolution and operation of the European Grid Infrastructure (EGI). In this framework, the EGI Operations Architecture defines the concept of Resource Infrastructures and Servi