The SGML handbook
From structured documents to novel query facilities
SIGMOD '94 Proceedings of the 1994 ACM SIGMOD international conference on Management of data
PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
A query language and optimization techniques for unstructured data
SIGMOD '96 Proceedings of the 1996 ACM SIGMOD international conference on Management of data
The TSIMMIS Approach to Mediation: Data Models and Languages
Journal of Intelligent Information Systems - Special issue: next generation information technologies and systems
A query language for a Web-site management system
ACM SIGMOD Record
Regular path queries with constraints
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Path constraints on semistructured and structured data
PODS '98 Proceedings of the seventeenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Your mediators need data conversion!
SIGMOD '98 Proceedings of the 1998 ACM SIGMOD international conference on Management of data
Object Exchange Across Heterogeneous Information Sources
ICDE '95 Proceedings of the Eleventh International Conference on Data Engineering
Correspondence and Translation for Heterogeneous Data
ICDT '97 Proceedings of the 6th International Conference on Database Theory
Adding Structure to Unstructured Data
ICDT '97 Proceedings of the 6th International Conference on Database Theory
DataGuides: Enabling Query Formulation and Optimization in Semistructured Databases
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
Using Schema Matching to Simplify Heterogeneous Data Translation
VLDB '98 Proceedings of the 24rd International Conference on Very Large Data Bases
Querying Heterogeneous Information Sources Using Source Descriptions
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
The Mathematical Theory of Context-Free Languages
The Mathematical Theory of Context-Free Languages
ICDT '01 Proceedings of the 8th International Conference on Database Theory
Incremental Validation of XML Documents
ICDT '03 Proceedings of the 9th International Conference on Database Theory
Classification Abstraction: An Intrinsic Element in Database Systems
ADVIS '00 Proceedings of the First International Conference on Advances in Information Systems
A Semantic Approach to Integrating XML and Structured Data Sources
CAiSE '01 Proceedings of the 13th International Conference on Advanced Information Systems Engineering
A Grammar Based Model for XML Schema Integration
BNCOD 17 Proceedings of the 17th British National Conferenc on Databases: Advances in Databases
Logic as a Query Language: From Frege to XML
STACS '03 Proceedings of the 20th Annual Symposium on Theoretical Aspects of Computer Science
On the Difference between Navigating Semi-structured Data and Querying It
DBPL '99 Revised Papers from the 7th International Workshop on Database Programming Languages: Research Issues in Structured and Semistructured Database Programming
Extensions of Attribute Grammars for Structured Document Queries
DBPL '99 Revised Papers from the 7th International Workshop on Database Programming Languages: Research Issues in Structured and Semistructured Database Programming
Typechecking for Semistructured Data
DBPL '01 Revised Papers from the 8th International Workshop on Database Programming Languages
Incremental validation of XML documents
ACM Transactions on Database Systems (TODS)
Attribute grammars for unranked trees as a query language for structured documents
Journal of Computer and System Sciences
Reducing application code complexity with vocabulary-specific XML language bindings
Proceedings of the 43rd annual Southeast regional conference - Volume 2
Associativity and Commutativity in Generic Merge
Conceptual Modeling: Foundations and Applications
Finding a minimal tree pattern under neighborhood constraints
Proceedings of the thirtieth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Exploiting schemas in data synchronization
DBPL'05 Proceedings of the 10th international conference on Database Programming Languages
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
Consistency of XML specifications
Inconsistency Tolerance
Extracting minimum-weight tree patterns from a schema with neighborhood constraints
Proceedings of the 16th International Conference on Database Theory
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With the emergence of the Web as a universal data repository, research has recently focused on data integration and data translation, and a common data model of semistructured data has been established. It is being realized, however, that having a common schema model is also necessary, to support tasks such as query formulation, decomposition and optimization, or declarative specification of data translation. In this paper we elaborate on the theoretical foundations of a middleware schema model. We present expressive and flexible schema definition languages, and investigate properties such as expressive power and the complexity of decision problems that are significant in the context of data translation and integration.