So to construct a nonblocking linked list, tree, or hash table, we need to find a way to update multiple Pointers with CAS without leaving the data structure in an inconsistent state.
所以，要构建一个非阻塞的链表、树或哈希表，需要找到一种方式，可以用CAS更新多个指针，同时不会让数据结构处于不一致的状态。
A DataGraph object represents data in a tree-like structure, with a root object at the top of the tree and children under it, similar to the structure that you might find in an XML document.
DataGraph对象以类似于树的形式表示数据，树的顶部是根对象，其下面为各个子项，与您在XML文档中看到的结构类似。
Data binding converts these XML trees to and from trees of objects (or sometimes graphs of objects, with links up or across the tree structure).
数据绑定使xml树和对象树(或者有时候是对象图，带有向上或跨整个树结构的链接)相互转换。
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