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2008

Querying XML in Timber

8 years 4 months ago
Querying XML in Timber
In this paper, we describe the TIMBER XML database system implemented at University of Michigan. TIMBER was one of the first native XML database systems, designed from the ground up to store and query semi-structured data. A distinctive principle of TIMBER is its algebraic underpinning. Central contributions of the TIMBER project include: (1) tree algebras that capture the structural nature of XML queries; (2) the stack-based family of algorithms to evaluate structural joins; (3) new rule-based query optimization techniques that take care of the heterogeneous nature of the intermediate results and take the schema information into consideration; (4) cost-based query optimization techniques and summary structures for result cardinality estimation; and (5) a family of structural indices for more efficient query evaluation. In this paper, we describe not only the architecture of TIMBER, its storage model, and engineering choices we made, but also present in hindsight, our retrospective on...
Yuqing Wu, Stelios Paparizos, H. V. Jagadish
Added 10 Dec 2010
Updated 10 Dec 2010
Type Journal
Year 2008
Where DEBU
Authors Yuqing Wu, Stelios Paparizos, H. V. Jagadish
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