title: xpathlearner : an on-line self-tuning markov histogram for xml path selectivity estimation vldb. authors: l lim , m wang , s padmanabhan , j vitter , r parr. venue: nan. year: 2002.0
title: bloom histogram : path selectivity estimation for xml data with updates w wang 2004.0. authors: nan. venue: proceedings of the international conference on very large & hellip ; ,. year: nan