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SIGMOD '98 Proceedings of the 1998 ACM SIGMOD international conference on Management of data
On wrapping query languages and efficient XML integration
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Data integration: a theoretical perspective
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Relational Database Writings 1994-1997
Relational Database Writings 1994-1997
Object Fusion in Mediator Systems
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
A Uniform Approach to Inter-model Transformations
CAiSE '99 Proceedings of the 11th International Conference on Advanced Information Systems Engineering
A Semantic Approach to Integrating XML and Structured Data Sources
CAiSE '01 Proceedings of the 13th International Conference on Advanced Information Systems Engineering
Developing XML Documents with Guaranteed ``Good'' Properties
ER '01 Proceedings of the 20th International Conference on Conceptual Modeling: Conceptual Modeling
NF-SS: A Normal Form for Semistructured Schema
Revised Papers from the HUMACS, DASWIS, ECOMO, and DAMA on ER 2001 Workshops
An Introduction to Database Systems
An Introduction to Database Systems
A normal form for XML documents
ACM Transactions on Database Systems (TODS)
VLDB '02 Proceedings of the 28th international conference on Very Large Data Bases
PATAXÓ: A framework to allow updates through XML views
ACM Transactions on Database Systems (TODS)
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Semi-structured data sources, such as XML, HTML or CSV files, present special problems when performing data integration. In addition to the hierarchical structure of the semistructured data, the data integration must deal with the redundancy in semi-structured data, where the same fact may be repeated in a data source, but should map into a single fact in a global integrated schema. We term semi-structured data containing such redundancy as being an unnormalised data source, and we define a normal form for semi-structured data that may be used when defining global schemas. We introduce special functions to relate object identifiers used in the global data model to object identifiers in unnormalised data sources, and demonstrate how to use these functions in query processing, update processing and integration of these data sources.