Research Query Engines
LORE (Stanford)
- Based on the LOREL query language
- A feature-rich DB approach to XML storage and query, with context-free indexing, path indexing through dataguides, query optimizations, and views
XSet (UCB, Ninja)
- Streamlined XML search engine implemented in Java
- Focus on high performance rather than feature set
- Small size favors integration into low-level applications
- Research issues on next slide