W. Tan

Publications
Influence

Why and Where: A Characterization of Data Provenance

P. Buneman, S. Khanna, W. Tan
Computer Science
ICDT
4 January 2001

We propose a syntactic approach to computing provenance when the data of interest has been created by a database query. Expand

Composing Schema Mappings: Second-Order Dependencies to the Rescue

Ronald Fagin, Phokion G. Kolaitis, L. Popa, W. Tan
Computer Science
PODS
2004

We give a rigorous semantics to the composition of schema mappings in which the specification is given by a finite set of source-to-target tuple-generating dependencies and investigate the definability and computational complexity of the composition. Expand

Provenance in Databases: Why, How, and Where

J. Cheney, Laura Chiticariu, W. Tan
Computer Science
Found. Trends Databases
1 April 2009

Provenance in Databases: Why, How, and Where James Cheney, Laura Chiticariu and Wang-Chiew Tan compare and contrast amongst them. Expand

An annotation management system for relational databases

Deepavali Bhagwat, Laura Chiticariu, W. Tan, Gaurav Vijayvargiya
Computer Science
The VLDB Journal
31 August 2004

We present an annotation management system for relational databases where annotations may be attached to a piece of data and are transparently carried along as data is being transformed. Expand

STBenchmark: towards a benchmark for mapping systems

B. Alexe, W. Tan, Yannis Velegrakis
Computer Science
Proc. VLDB Endow.
1 August 2008

A fundamental problem in information integration is to precisely specify the relationships, called mappings, between schemas. Expand

Keys for XML

P. Buneman, S. Davidson, W. Fan, C. Hara, W. Tan
Computer Science
Comput. Networks
5 August 2002

We discuss the definition of keys for XML documents, paying particular attention to the concept of a relative key , which is commonly used in hierarchically structured documents. Expand

On propagation of deletions and annotations through views

P. Buneman, S. Khanna, W. Tan
Computer Science
PODS '02
3 June 2002

We study two classes of view update problems in relational databases. Expand

Keys for XML

P. Buneman, S. Davidson, W. Fan, C. Hara, W. Tan
Computer Science
WWW '01
1 May 2001

We discuss the definition of keys for XML documents, paying particular attention to the concept of a relative key, which is commonly used in hierarchically structured documents and scientific databases. Expand

Reasoning about keys for XML

P. Buneman, S. Davidson, W. Fan, C. Hara, W. Tan
Computer Science
Inf. Syst.
1 December 2003

We study absolute and relative keys for XML, and investigate their associated decision problems. Expand

SilkRoute: trading between relations and XML

M. Fernández, W. Tan, Dan Suciu
Computer Science
Comput. Networks
1 June 2000

We describe SilkRoute, a general , dynamic , and efficient tool for viewing and querying relational data in XML. Expand

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