Proceedings of the 10th international conference on World Wide Web
On XML integrity constraints in the presence of DTDs
Journal of the ACM (JACM)
XKvalidator: a constraint validator for XML
Proceedings of the eleventh international conference on Information and knowledge management
Discovering approximate keys in XML data
Proceedings of the eleventh international conference on Information and knowledge management
ACM SIGMOD Record
Containment for XPath Fragments under DTD Constraints
ICDT '03 Proceedings of the 9th International Conference on Database Theory
DBPL '01 Revised Papers from the 8th International Workshop on Database Programming Languages
What's Hard about XML Schema Constraints?
DEXA '02 Proceedings of the 13th International Conference on Database and Expert Systems Applications
A Web odyssey: from codd to XML
ACM SIGMOD Record
Journal of Computer and System Sciences - Special issue on PODS 2000
Information Systems
Containment and equivalence for a fragment of XPath
Journal of the ACM (JACM)
ACM SIGMOD Record
Strong functional dependencies and their application to normal forms in XML
ACM Transactions on Database Systems (TODS)
Efficient algorithms for processing XPath queries
ACM Transactions on Database Systems (TODS)
Structural properties of XPath fragments
Theoretical Computer Science - Database theory
Efficient discovery of XML data redundancies
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
On the Complexity of Verifying Consistency of XML Specifications
SIAM Journal on Computing
WoLLIC'07 Proceedings of the 14th international conference on Logic, language, information and computation
ICDT'07 Proceedings of the 11th international conference on Database Theory
Consistency of XML specifications
Inconsistency Tolerance
Checking Satisfactions of XML Referential Integrity Constraints
AMT '09 Proceedings of the 5th International Conference on Active Media Technology
On the Performances of Checking XML Key and Functional Dependency Satisfactions
OTM '09 Proceedings of the Confederated International Conferences, CoopIS, DOA, IS, and ODBASE 2009 on On the Move to Meaningful Internet Systems: Part II
On the role of the complementation rule for data dependencies over incomplete relations
WoLLIC'10 Proceedings of the 17th international conference on Logic, language, information and computation
Promoting the semantic capability of XML keys
XSym'10 Proceedings of the 7th international XML database conference on Database and XML technologies
Transforming geometrically enhanced conceptual model schemas to GML
Conceptual Modelling and Its Theoretical Foundations
On Inferences of Full First-Order Hierarchical Decompositions
Fundamenta Informaticae - Logic, Language, Information and Computation
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Ongoing efforts in academia and industry to advance the management of XML data have created an increasing interest in research on integrity constraints for XML. In particular keys have recently gained much attention. Keys help to discover and capture relevant semantics of XML data, and are crucial for developing better methods and tools for storing, querying and manipulating XML data. Various notions of keys have been proposed and investigated over the past few years. Due to the different ways of picking and comparing data items involved, these proposals give rise to constraint classes that differ in their expressive power and tractability of the associated decision problems. This paper provides an overview of XML key proposals that enjoy popularity in the research literature.