An aspect of query optimization in multidatabase systems
ACM SIGMOD Record
OLAP solutions: building multidimensional information systems
OLAP solutions: building multidimensional information systems
On wrapping query languages and efficient XML integration
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
SchemaSQL: An extension to SQL for multidatabase interoperability
ACM Transactions on Database Systems (TODS)
APEX: an adaptive path index for XML data
Proceedings of the 2002 ACM SIGMOD international conference on Management of data
Constructing an OLAP cube from distributed XML data
Proceedings of the 5th ACM international workshop on Data Warehousing and OLAP
Specifying OLAP Cubes on XML Data
Journal of Intelligent Information Systems
Views in a large-scale XML repository
The VLDB Journal — The International Journal on Very Large Data Bases
Database Integration in a Distributed Heterogeneous Database System
Proceedings of the Second International Conference on Data Engineering
Relational Databases for Querying XML Documents: Limitations and Opportunities
VLDB '99 Proceedings of the 25th International Conference on Very Large Data Bases
DBPL '01 Revised Papers from the 8th International Workshop on Database Programming Languages
The VLDB Journal — The International Journal on Very Large Data Bases
Anatomy of a native XML base management system
The VLDB Journal — The International Journal on Very Large Data Bases
Efficiently publishing relational data as XML documents
The VLDB Journal — The International Journal on Very Large Data Bases
Detecting Changes in XML Documents
ICDE '02 Proceedings of the 18th International Conference on Data Engineering
ORDPATHs: insert-friendly XML node labels
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
A partition index for XML and semi-structured data
Data & Knowledge Engineering
On the consistency of XML DTDs
Data & Knowledge Engineering - Special issue: XML schema and data management
XML data exchange: consistency and query answering
Proceedings of the twenty-fourth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Schema mappings, data exchange, and metadata management
Proceedings of the twenty-fourth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
System RX: one part relational, one part XML
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
Extending XQuery for analytics
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
Efficient keyword search for smallest LCAs in XML databases
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
Query rewrite for XML in Oracle XML DB
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
Indexing XML data stored in a relational database
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
A tool for data cube construction from structurally heterogeneous XML documents
Journal of the American Society for Information Science and Technology
XML-OLAP: a multidimensional analysis framework for XML warehouses
DaWaK'05 Proceedings of the 7th international conference on Data Warehousing and Knowledge Discovery
Information interaction in molecular medicine: integrated use of multiple channels
Proceedings of the third symposium on Information interaction in context
Finding association rules in semantic web data
Knowledge-Based Systems
Building data warehouses with semantic web data
Decision Support Systems
Barriers to task-based information access in molecular medicine
Journal of the American Society for Information Science and Technology
XML data exchange with target constraints
Information Processing and Management: an International Journal
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There are numerous approaches for integrating data from heterogeneous data sources. A common background assumption is that the data sources remain quite stable and are known in advance. Hence an integration system can be built to manipulate them. In practice there is, however, often a demand for supporting ad hoc information needs concerning unexpected autonomous data sources containing volatile data. A different approach is therefore needed. We propose that semantically similar data are harmonized when extracting data from XML-based data sources. We introduce a constructor algebra, which is a powerful tool in the harmonization of XML data. This algebra is able to form for any XML data source a unique relational representation, called an XML relation. We demonstrate that the XML relation representation supports grouping and aggregation of data needed, for example, in OLAP (online analytical processing) -style applications.