It is an optional attribute, which you use if your application requires loading class definitions by reading their location from ApacheDS.
这是个可选属性,如果应用程序需要从ApacheDS读取类的位置以便装入类定义的时候才用这个属性。
2
Recall that many of the Eclipse extension point definitions require the contributor to statically declare enough information so that loading code can be deferred until the requested action is needed.