Method for Query Processing and Updating on Dynamic XML data
Jun‐Ki Min, Jihyun Lee, Chin‐Wan Chung · 2008
In this paper, we propose an ecient encoding and labeling scheme for XML, called EXEL, which is a variant of the region labeling scheme using ordinal and insertfriendly bit strings. We devise a binary encoding method to generate the ordinal bit strings, and an algorithm to make a new bit string inserted between bit strings without any influences on the order of preexisting bit strings. These binary encoding method and bit string insertion algorithm are the bases of the ecient query processing and the complete avoidance of re-labeling for updates. We present query processing and update processing methods based on EXEL. In addition, the StackTree-Desc algorithm is used for an ecient structural join, and the String B-tree indexing is utilized to improve the join performance. Finally, the experimental results show that EXEL enables complete avoidance of re-labeling for updates while providing fairly reasonable query processing performance.