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PODS
2006
ACM
88views Database» more  PODS 2006»
14 years 7 months ago
Structural characterizations of the semantics of XPath as navigation tool on a document
Given a document D in the form of an unordered labeled tree, we study the expressibility on D of various fragments of XPath, the core navigational language on XML documents. We gi...
Marc Gyssens, Jan Paredaens, Dirk Van Gucht, Georg...
ICDT
2010
ACM
259views Database» more  ICDT 2010»
14 years 4 months ago
Forward-XPath and extended register automata on data-trees
We consider a fragment of XPath named `forward-XPath', which contains all descendant and rightwards sibling axes as well as data equality and inequality tests. The satisfiabi...
Diego Figueira
ISCI
2007
115views more  ISCI 2007»
13 years 7 months ago
Compressed histograms with arbitrary bucket layouts for selectivity estimation
Selectivity estimation is an important step of query optimization in a database management system, and multidimensional histogram techniques have proved promising for selectivity ...
Dennis Fuchs, Zhen He, Byung Suk Lee
ICDM
2006
IEEE
176views Data Mining» more  ICDM 2006»
14 years 1 months ago
Razor: mining distance-constrained embedded subtrees
Due to their capability for expressing semantics and relationships among data objects, semi-structured documents have become a common way of representing domain knowledge. Compari...
Henry Tan, Tharam S. Dillon, Fedja Hadzic, Elizabe...
BMCBI
2008
154views more  BMCBI 2008»
13 years 7 months ago
Extension of the COG and arCOG databases by amino acid and nucleotide sequences
Background: The current versions of the COG and arCOG databases, both excellent frameworks for studies in comparative and functional genomics, do not contain the nucleotide sequen...
Florian Meereis, Michael Kaufmann