Norman May Matthias Brantner Alexander Böhm 0002 Carl-Christian Kanne Guido Moerkotte Index vs. Navigation in XPath Evaluation. 16-30 2006 conf/xsym/2006 XSym http://dx.doi.org/10.1007/11841920_2 db/conf/xsym/xsym2006.html#MayBBKM06