XQL and Proximal Nodes

Abstract

Despite that several models to structure text documents and to query on this structure have been proposed in the past a standard has emerged only relatively recently with the introduction of XML and its proposed query language XQL on which we focus in this paper Although there exist some implementations of XQL e ciency of the query engine is still a problem We show in this paper that an already existing model Proximal Nodes which was de ned with the goal of e ciency in mind can be used as an e cient query engine behind an XQL front end