OTwig: An Optimised Twig Pattern Matching Approach for XML Databases

Authors:
Jun Liu;Mark Roantree
Affiliations:
Interoperable Systems Group, Dublin City University, Ireland;Interoperable Systems Group, Dublin City University, Ireland
Venue:
SOFSEM '10 Proceedings of the 36th Conference on Current Trends in Theory and Practice of Computer Science
Year:
2009

Citing 13
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Abstract

Twig based optimisation is one of the current approaches to improving XML query performance. It uses structural joins to find all pairs of elements in the XML documents satisfying the primitive structural relationships specified in the XML queries. They focus on parent-child and ancestor-descendant relationships. Efficient location of all joins is one of the core operations in XML query processing. In this paper, we propose a pattern matching algorithm called OTwig, which extends existing research on twig pattern matching. It demonstrates an improvement over existing pattern matching algorithms while also optimising memory usage.