There have been a number of algorithms proposed for structural join,but all of these are not support for multiversion XML documents.
目前已经提出了许多结构连接的算法，但都不支持多版本的XML文档。
参考来源 - 期刊学术社区·2,447,543篇论文数据，部分数据来源于NoteExpress
This feature to implement multiversion concurrency control (MVCC) : when mutations within a transaction are applied, the values are written at the timestamp of their transaction.
该特性实现了多版本并发控制(MVCC)：当使用了事务时，在写入值时需要带上其事务的时间戳。
Multiversion optimistic concurrency control (MVOCC) protocol and mobile transaction real-time commit (MTRTC) protocol are presented for mobile distributed real-time database systems (MDRTDBSs).
提出了移动事务实时提交协议(MTRTC)和多版本乐观并发控制协议(MVOCC)处理移动分布式实时事务。
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