Approximate XML Query Answers

Summary: Proposes TREESKETCH synopses for compact, approximate XML query answering over large tree-structured data. Introduces novel construction algorithms and an error metric, enabling fast twig queries with high accuracy and outperforming selectivity-only approaches. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID: 3524
Venue: SIGMOD
Year: 2004
Pagerank: 7.1173416e-05
Overall Rank: 3,419 | 76.22%
DOI: -

Incoming Non-self Citations Over Time

Authors

Incoming Citations (Sorted by Pagerank)

Showing 11 of 11 citing papers.

Rank	Citing Paper	Year	Venue	Pagerank
2,665	Statistical Learning Techniques for Costing XML Queries	2005	VLDB	8.3498101e-05
3,511	Accurate Summary-based Cardinality Estimation Through the Lens of Cardinality Estimation Graphs	2022	VLDB	7.0254052e-05
3,593	Graph-Based Synopses for Relational Selectivity Estimation	2006	SIGMOD	6.9385476e-05
4,406	Approximate Matching of Hierarchical Data Using pq-Grams	2005	VLDB	6.2141638e-05
5,369	Pyramid Sketch: a Sketch Framework for Frequency Estimation of Data Streams	2017	VLDB	5.5434712e-05
5,575	Structure and Content Scoring for XML	2005	VLDB	5.4264592e-05
6,713	Query Relaxation Using Malleable Schemas	2007	SIGMOD	4.951387e-05
6,732	An Incrementally Maintainable Index for Approximate Lookups in Hierarchical Data	2006	VLDB	4.9477058e-05
6,874	ROX: Run-time Optimization of XQueries	2009	SIGMOD	4.8978984e-05
8,440	Materialized View Selection for XQuery Workloads	2012	SIGMOD	4.5127636e-05
12,506	AQAX: A System for Approximate XML Query Answers	2006	VLDB	4.1945683e-05

Outgoing Citations (Sorted by Pagerank)

Showing 12 of 12 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank	Cited Paper	Year	Venue	Pagerank
33	BIRCH: An Efficient Data Clustering Method for Very Large Databases	1996	SIGMOD	0.00077324389
361	Histogram-Based Approximation of Set-Valued Query Answers	1999	VLDB	0.00025775749
405	Approximate Query Processing Using Wavelets	2000	VLDB	0.00024057494
501	Query Optimization for XML	1999	VLDB	0.00021530411
1,046	Estimating the Selectivity of XML Path Expressions for Internet Scale Applications	2001	VLDB	0.00014462307
2,010	StatiX: Making XML Count	2002	SIGMOD	9.7970026e-05
2,316	Statistical Synopses for Graph-Structured XML Databases	2002	SIGMOD	9.0419716e-05
2,507	Path Queries on Compressed XML	2003	VLDB	8.6311009e-05
3,113	Structure and Value Synopses for XML Data Graphs	2002	VLDB	7.5469926e-05
3,610	From Tree Patterns to Generalized Tree Patterns: On Efficient Evaluation of XQuery	2003	VLDB	6.9196208e-05
4,660	XPathLearner: An On-Line Self-Tuning Markov Histogram for XML Path Selectivity Estimation	2002	VLDB	6.014625e-05
7,827	Containment Join Size Estimation: Models and Methods	2003	SIGMOD	4.6411831e-05

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Overall Rank	Paper	Year	Venue	Pagerank
4,207	Mixed Mode XML Query Processing	2003	VLDB	6.359465e-05
6,681	Query Efficiency in Probabilistic XML Models	2008	SIGMOD	4.9643102e-05
2,784	Approximate XML Joins	2002	SIGMOD	8.128931e-05
12,215	Certain Answers for XML Queries	2010	PODS	4.1945683e-05
1,663	Conjunctive Queries over Trees	2004	PODS	0.00010977096
2,855	Efficient Processing of Expressive Node-Selecting Queries on XML Data in Secondary Storage: A Tree Automata-based Approach	2003	VLDB	8.0059865e-05
1,046	Estimating the Selectivity of XML Path Expressions for Internet Scale Applications	2001	VLDB	0.00014462307
12,506	AQAX: A System for Approximate XML Query Answers	2006	VLDB	4.1945683e-05
3,113	Structure and Value Synopses for XML Data Graphs	2002	VLDB	7.5469926e-05
2,316	Statistical Synopses for Graph-Structured XML Databases	2002	SIGMOD	9.0419716e-05