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Modeling and Merging Database Schemas

... Kosky, A.S. Author:  Kosky, A Year:  ...

Publication - huliganka - 07/03/2022 - 23:42 - 0 comments - 0 attachments

Structural characterizations of schema-mapping languages

... 11.7 KB Information integration is a key challenge faced by all major organizations, business and governmental ... formalisms and are chosen with two criteria in mind: (a) expressive power sufficient to specify interesting data interoperability ...

Publication - cat - 04/17/2013 - 11:16 - 0 comments - 1 attachment

An Introduction to the ATLAS Model Management Architecture

... The concept of “model” is today considered as a promising technology in domains such as data and software engineering. In ... processes. Such an integration will however require a set of dedicated tools enabling to perform standard model operations onto ...

Publication - huliganka - 04/17/2013 - 00:49 - 0 comments - 1 attachment

Change detection in hierarchically structured information

... Sudarshan, C. S.; Rajaraman, A.; Garcia-Molina, H.; Widom, J. ... Rajaraman, A Garcia-Molina, H ...

Publication - huliganka - 04/17/2013 - 00:49 - 0 comments - 1 attachment

Meaningful change detection in structured data

... These operations allows us to describe changes in a semantically more meaningful way. Since this change detection problem is NP-hard, in this paper we present a heuristic change detection algorithm that yields close to “minimal” ... is based on transforming the change detection problem to a problem of computing a minimum-cost edge cover of a bipartite graph. We study ...

Publication - huliganka - 04/17/2013 - 00:38 - 0 comments - 1 attachment

An O(ND) Difference Algorithm and Its Variations

... 81.22 KB The problems of finding a longest common subsequence of two sequences A and B and a shortest edit script for transforming A into B have long been ...

Publication - huliganka - 04/16/2013 - 23:16 - 0 comments - 1 attachment

Theoretical Aspects of Schema Merging

... Buneman, P.; Davidson, S.; Kosky, A. Author:  ... S Kosky, A Year:  ...

Publication - huliganka - 04/16/2013 - 20:38 - 0 comments - 1 attachment

A Model Theory for Generic Schema Management

... Alagic, S.; Bernstein, P.A. Author:  ... 0 Citations range:  ...

Publication - huliganka - 04/16/2013 - 19:27 - 0 comments - 1 attachment

Composing Schema Mappings: Second-Order Dependencies to the Rescue

... 486.39 KB A schema mapping is a specification that describes how data structured under one schema (the ... schema) is to be transformed into data structured under a different schema (the target schema). A fundamental problem is composing ...

Publication - cat - 04/16/2013 - 19:16 - 0 comments - 1 attachment

Generic Model Management: Concepts and Algorithms

... needed to develop such applications by providing a database infrastructure in which a set of high-level algebraic operators, such as Match, Merge, and Compose, ...

Publication - cat - 04/16/2013 - 18:38 - 0 comments - 1 attachment

Inverting Schema Mappings

... Fagin2006InvertingSchema.pdf 433.52 KB A schema mapping is a specification that describes how data structured under one schema (the ...

Publication - cat - 04/16/2013 - 18:27 - 0 comments - 1 attachment

Relational languages for metadata integration

... 0 Citations range:  n/a Attachment Size ... 676.21 KB In this article, we develop a relational algebra for metadata integration, Federated Interoperable ...

Publication - cat - 04/16/2013 - 18:27 - 0 comments - 1 attachment

On the computation of relational view complements

... range:  n/a Attachment Size ... 311.36 KB Views as a means to describe parts of a given data collection play an important role in many database applications. ...

Publication - cat - 04/16/2013 - 18:16 - 0 comments - 1 attachment

Management of Multiple Models in an Extensible Database Design Tool

... 213.48 KB We describe the development of a tool called MDM for the management of multiple models and the translation ... for the same data schemes We first present a graph-theoretic framework that allows us to formally investigate desirable ...

Publication - huliganka - 04/16/2013 - 15:49 - 0 comments - 1 attachment

Weaving Models with the Eclipse AMW plugin

... because they conform to different extensions of a core weaving metamodel. In this paper, we explain in detail what a model weaving is. We present a set of application scenarios, and we extract ...

Publication - huliganka - 04/16/2013 - 07:38 - 0 comments - 0 attachments

On the Editing Distance between Undirected Acyclic Graphs and Related Problems

... degree-2 distance, when applied to unordered trees, is a restricted form of the constrained distance previously reported in [27]. When applied to ordered trees, the degree-2 distance is a generalized measure of the constrained distance originated from Selkow ...

Publication - huliganka - 04/16/2013 - 06:16 - 0 comments - 0 attachments

Correct Schema Transformations.

... 10 - 49 We develop a formal basis of correct schema transformations. Schemas are formalized as ...

Publication - cat - 04/16/2013 - 03:49 - 0 comments - 0 attachments

A semantic meta-modelling approach to schema transformation

... presents an intermediate meta-model that consists of a set of generic meta-classes that capture and describe the semantics of a variety of data models. A model is described by a set of intermediate model ...

Publication - huliganka - 04/16/2013 - 00:49 - 0 comments - 0 attachments

A General Formal Framework for Schema Transformation

... McBrien, P.; Poulovassilis, A. Author:  ... Poulovassilis, A Year:  ...

Publication - huliganka - 04/16/2013 - 00:49 - 0 comments - 0 attachments

Schema Translation between Heterogeneous Data Models in a Lattice Framework

... translating schemes between different data models, in a formal framework that refers to a wide range of models. We first introduce a graphtheoretic formalism that ...

Publication - huliganka - 04/15/2013 - 23:16 - 0 comments - 0 attachments