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PODS
2008
ACM
120views Database» more  PODS 2008»
16 years 6 months ago
Effective characterizations of tree logics
A survey of effective characterizations of tree logics. If L is a logic, then an effective characterization for L is an algorithm, which inputs a tree automaton and replies if the...
Mikolaj Bojanzyk
WWW
2007
ACM
16 years 7 months ago
From SPARQL to rules (and back)
As the data and ontology layers of the Semantic Web stack have achieved a certain level of maturity in standard recommendations such as RDF and OWL, the current focus lies on two ...
Axel Polleres
BIBM
2008
IEEE
144views Bioinformatics» more  BIBM 2008»
16 years 1 months ago
PhyQL: A Web-Based Phylogenetic Visual Query Engine
Biologists are often interested to query published phylogenetic data for research purposes. PhyQL, a web-based visual phylogenetic query engine, can be quite useful on this regard...
Shahriyar Hossain, Munirul Islam, Jesmin, Hasan M....
SEMWEB
2010
Springer
15 years 4 months ago
Combining Approximation and Relaxation in Semantic Web Path Queries
We develop query relaxation techniques for regular path queries and combine them with query approximation in order to support flexible querying of RDF data when the user lacks know...
Alexandra Poulovassilis, Peter T. Wood
ICDT
2009
ACM
198views Database» more  ICDT 2009»
16 years 7 months ago
Consistent query answering under primary keys: a characterization of tractable queries
This article deals with consistent query answering to conjunctive queries under primary key constraints. The repairs of an inconsistent database db are obtained by selecting a max...
Jef Wijsen