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» The DSD Schema Language
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PODS
2004
ACM
158views Database» more  PODS 2004»
14 years 7 months ago
Composing Schema Mappings: Second-Order Dependencies to the Rescue
A schema mapping is a specification that describes how data structured under one schema (the source schema) is to be transformed into data structured under a different schema (the...
Ronald Fagin, Phokion G. Kolaitis, Lucian Popa, Wa...
ISSRE
2005
IEEE
14 years 1 months ago
Testing Web Services by XML Perturbation
The eXtensible Markup Language (XML) is widely used to transmit data across the Internet. XML schemas are used to define the syntax of XML messages. XML-based applications can re...
Wuzhi Xu, Jeff Offutt, Juan Luo
ODBIS
2007
Springer
157views Database» more  ODBIS 2007»
14 years 1 months ago
An Extension of SPARQL for RDFS
Abstract. RDF Schema (RDFS) extends RDF with a schema vocabulary with a predefined semantics. Evaluating queries which involve this vocabulary is challenging, and there is not yet...
Marcelo Arenas, Claudio Gutierrez, Jorge Pé...
VLDB
2005
ACM
165views Database» more  VLDB 2005»
14 years 1 months ago
Semantic Adaptation of Schema Mappings when Schemas Evolve
Schemas evolve over time to accommodate the changes in the information they represent. Such evolution causes invalidation of various artifacts depending on the schemas, such as sc...
Cong Yu, Lucian Popa
WEBDB
2009
Springer
100views Database» more  WEBDB 2009»
14 years 2 months ago
Towards Well-Behaved Schema Evolution
We study the problem of schema evolution in the RDF data model. RDF and the RDFS schema language are W3C standards for flexibly modeling and sharing data on the web. Although sch...
Rada Chirkova, George H. L. Fletcher