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EDBT
2002
ACM
15 years 9 months ago
2002
ACM
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
WEBDB
2010
Springer
15 years 2 months ago
2010
Springer
Tree patterns with full text search form the core of both XQuery Full Text and the NEXI query language. On such queries, users expect a relevance-ranked list of XML elements as an...
AIED
2005
Springer
15 years 3 months ago
2005
Springer
Abstract. This paper describes the process by which we are constructing an intelligent tutoring system (ERST) designed to improve learners’ external representation (ER) selection...
WWW
2007
ACM
15 years 10 months ago
2007
ACM
Most RDF query languages allow for graph structure search through a conjunction of triples which is typically processed using join operations. A key factor in optimizing joins is ...
VLDB
2005
ACM
15 years 3 months ago
2005
ACM
Existing work for query processing over graph data models often relies on pre-computing the transitive closure or path indexes. In this paper, we propose a family of stack-based a...