Ownership management can be further simplified by ensuring that all alias pointers have scope that is tied to the call stack , such as method parameters or local variables , and by copying the object if a reference is going to be held by a non - stack - scoped variable （通过确保所有的别名指针都具有与调用堆栈（比如方法参数或局部变量）一致的作用域（ scope ） ，可以进一步简化所有权管理，如果引用将由非堆栈作用域的变量保存，则通过复制对象来进行简化。 ）
The framework firstly abstracts two types of replication objects : publication and subscription ; then constructs a three - layer open architecture : connection layer , implementation layer and application layer ; four components ( capturing manager , distributor , synchronizer and conflicts manger ) are defined in the implementation layer ; thus it can entirely solve five problems : fully heterogeneous , all - round functions , transplantability , expandability and global performance 它首先抽象出两类复制对象：出版物和预订；然后建立由连接层、实现层和应用层组成的三层开放式结构；实现层则定义捕获器、同步器、分发器和冲突管理器四个功能构件；从而全面地解决完全异构、全面功能、可移植性、可扩充性和整体性能五方面的问题。
