Search: in, Sigmod / VLDB, 10 - 49

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Laconic Schema Mappings: Computing the Core with SQL Queries

... over the target schema that satisfies the schema mapping. In general, a given source instance may have numerous different solutions. ...

Publication - hartung - 04/17/2013 - 12:16 - 0 comments - 1 attachment

DB2/XML: Designing for Evolution

... and XQuery using the XML data type introduced by SQL/XML. In this tutorial we focus on DB2s XML support for schema evolution, especially ...

Publication - cat - 04/17/2013 - 08:16 - 0 comments - 1 attachment

PRIMA: Archiving and Querying Historical Data with Evolving Schemas

... Schema evolution poses serious challenges in historical data management. Traditionally the archival data has been (i) ... or (ii) maintained under the original schema version in which they firstly appeared, leading to a perfect archival quality, but to a ...

Publication - krlis1337 - 04/17/2013 - 07:27 - 0 comments - 0 attachments

Update Rewriting and Integrity Constraint Maintenance in a Schema Evolution Support System: PRISM++

... more difficult and have thus far remained unsolved. In this paper, we address this issue by introducing a formal evolution model ... including the Genetic DB Ensembl (410+ schema versions in 9 years), and Wikipedia (240+ schema versions in 6 years). (Database ...

Publication - krlis1337 - 04/17/2013 - 06:49 - 0 comments - 0 attachments

Core Schema Mappings

... are yet no mapping systems that support core computations. In this paper we introduce several new algorithms that contribute to bridge the ...

Publication - salva - 04/17/2013 - 06:05 - 0 comments - 0 attachments

Incremental Reorganization Of Relational Databases

... The evolution of an information system is reflected in data modeling by database reorganization. Entity-Relationship (ER) ...

Publication - erhard - 04/16/2013 - 11:05 - 0 comments - 1 attachment

Data exchange with data-metadata translations

... from the first schema to an instance of the second schema. In particular, the ability to perform data-metadata translations, transformation in which data is converted into metadata or metadata is converted into data, is ...

Publication - paolop - 04/16/2013 - 10:05 - 0 comments - 1 attachment

On complementary and independent mappings on databases

... relationship between independent and complementary views In unrestricted domains, a view (but not the identity or empty view) can have ... A view is monotonic if it preserves inclusion However, in finite power sets when all views are monotonic, if a given view has another ...

Publication - huliganka - 04/16/2013 - 05:49 - 0 comments - 1 attachment

Managing knowledge about information system evolution

... of these system components to the real-world environment in which the information system is intended to function. A decision-centered ...

Publication - cat - 04/16/2013 - 01:38 - 0 comments - 1 attachment

Normalization and Optimization of Schema Mappings

... between two database schemas. They are an important tool in several areas of database research, notably in data integration and data exchange. However, a concrete theory of schema ...

Publication - hartung - 04/16/2013 - 00:27 - 0 comments - 1 attachment

A Gauss Function Based Approach for Unbalanced Ontology Matching

... between two ontologies, has played a key role in data exchange, data integration and metadata management. Among numerous ... the information over multiple domains, is not well studied in the community. In this paper, we propose a novel Gauss Function based ...

Publication - hartung - 04/15/2013 - 23:49 - 0 comments - 1 attachment

Inverting Schema Mappings: Bridging the Gap between Theory and Practice

... of a general framework for metadata management. In fact, during the last years three alternative notions of inversion for ... practical applicability. First, these algorithms work in exponential time and produce inverse mappings of exponential size. Second, ...

Publication - hartung - 04/15/2013 - 23:38 - 0 comments - 1 attachment