Song Wang Hong Su Ming Li Mingzhu Wei Shoushen Yang Drew Ditto Elke A. Rundensteiner Murali Mani R-SOX: Runtime Semantic Query Optimization over XML Streams. 1207-1210 2006 conf/vldb/2006 VLDB http://www.vldb.org/conf/2006/p1207-wang.pdf db/conf/vldb/vldb2006.html#WangSLWYDRM06