Functional dependencies and constraints on Null values in database relations
Information and Control
Path constraints on semistructured and structured data
PODS '98 Proceedings of the seventeenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Axiomatisation of functional dependencies in incomplete relations
Theoretical Computer Science
Reasoning about nested functional dependencies
PODS '99 Proceedings of the eighteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Computational problems related to the design of normal form relational schemas
ACM Transactions on Database Systems (TODS)
On XML integrity constraints in the presence of DTDs
PODS '01 Proceedings of the twentieth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Designing Functional Dependencies for XML
EDBT '02 Proceedings of the 8th International Conference on Extending Database Technology: Advances in Database Technology
XPath Containment in the Presence of Disjunction, DTDs, and Variables
ICDT '03 Proceedings of the 9th International Conference on Database Theory
Information Systems
A normal form for XML documents
ACM Transactions on Database Systems (TODS)
Strong functional dependencies and their application to normal forms in XML
ACM Transactions on Database Systems (TODS)
XPath satisfiability in the presence of DTDs
Proceedings of the twenty-fourth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Redundancy, dependencies and normal forms for XML databases
ADC '05 Proceedings of the 16th Australasian database conference - Volume 39
Design principles for xml data
Design principles for xml data
A comparative study of functional dependencies for XML
APWeb'05 Proceedings of the 7th Asia-Pacific web conference on Web Technologies Research and Development
Solving the implication problem for XML functional dependencies with properties
WoLLIC'10 Proceedings of the 17th international conference on Logic, language, information and computation
The implication problem for 'closest node' functional dependencies in complete XML documents
Journal of Computer and System Sciences
| Hi-index | 0.00 |
With the rise of XML as a standard model of data exchange, XML functional dependencies (XFDs) have become important to areas such as key analysis, document normalization, and data integrity. XFDs are more complicated than relational functional dependencies because the set of XFDs satisfied by an XML document depends not only on the document values, but also the tree structure and corresponding DTD. In particular, constraints imposed by DTDs may alter the implications from a base set of XFDs, and may even be inconsistent with a set of XFDs. In this paper we examine the interaction between XFDs and DTDs. We present a sound and complete axiomatization for XFDs, both alone and in the presence of certain classes of DTDs; we show that these DTD classes induce an axiomatic hierarchy. We also give efficient implication algorithms for those classes of DTDs that do not use disjunction or nesting.