Ho Lam Lau Wilfred Ng Storing and Querying XML Data in the Nested Relational Sequence Database System. 182-191 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2736&spage=182 2003 conf/dexa/2003 DEXA db/conf/dexa/dexa2003.html#LauN03