12,131 Hits in 4.9 sec

Integrated Model-Based Software Development, Data Access, and Data Migration [chapter]

Behzad Bordbar, Dirk Draheim, Matthias Horn, Ina Schulz, Gerald Weber
2005 Lecture Notes in Computer Science  
In this paper we describe a framework for robust system maintenance that addresses specific challenges of data-centric applications.  ...  We report on experiences with the approach in the IMIS environmental mass database project.  ...  Schema versioning is based on a view mechanism and all changes, i.e., in particular deletes, are recorded in view changes.  ... 
doi:10.1007/11557432_28 fatcat:zj7ja2or3nhr5dr7dmgtzl7r4u

Managing source schema evolution in web warehouses

Adriana Marotta, Regina Motz, Raul Ruggia
2002 Journal of the Brazilian Computer Society  
In this work we address the effects of adding/removing/changing Web sources and data items to the Data Warehouse (DW) schema.  ...  One of the main challenges in these systems is to deal with the volatile and dynamic nature of Web sources.  ...  Thus, Web Warehouse systems should include mechanisms to manage schema evolution within the integrated schema in order to minimize effects of source changes on web warehouses.  ... 
doi:10.1590/s0104-65002002000200003 fatcat:u7und3al7vhwno7oji5zc5l56m

Database schema evolution using EVER diagrams

Chien-Tsai Liu, Shi-Kuo Chang, Panos K. Chrysanthis
1994 Proceedings of the workshop on Advanced visual interfaces - AVI '94  
schema versions, relationships among attributes, and the conditions for maintaining consistent views of programs.  ...  We present an approach to schema evolution through changes to the ER diagram representing the schema of a database.  ...  In our framework based on ER schema evolution, we comby ensuring a consistent database along three dimensions: object consistency, key consistency, and invariant program views.  ... 
doi:10.1145/192309.192338 dblp:conf/avi/LiuCC94 fatcat:e22awadkl5hvfjgdwcznxr763e

An IDE-based, Integrated Solution to Schema Evolution of Object-Oriented Software

Marco Piccioni, Manuel Orioly, Bertrand Meyer, Teseo Schneider
2009 2009 IEEE/ACM International Conference on Automated Software Engineering  
This article describes the principles behind invariant-safe schema evolution, and the design and implementation of the ESCHER system.  ...  Retrieving previously "persisted" objects from classes whose schema changed is however difficult, and may lead to invalidating the consistency of the application.  ...  If some "transparent schema evolution" is being used, there is a concrete risk of having inconsistent objects being granted access to the system. • Schema evolution-aware development: developers are aware  ... 
doi:10.1109/ase.2009.100 dblp:conf/kbse/PiccioniOMS09 fatcat:5oedfh32lbgtvjoxzzrmtgdc2u

Evolution towards, in, and beyond object databases [chapter]

Marc H. Scholl, Markus Tresch
1994 Lecture Notes in Computer Science  
The following are presented in more detail: rst, we describe the necessity o f o b j e c t e v olution over time second, we discuss schema evolution and third, we p r e s e n t e v olutionary database  ...  There is a manifold of meanings we could associate with the term \evolution" in the database arena.  ...  We n o w argue that data independence in object database systems is a rst attempt to realize database evolution. In fact, views can be used straight f o r w ard to simulate some schema evolutions.  ... 
doi:10.1007/3-540-57802-1_4 fatcat:viytjhtnfveyle5ghf6whoag7u

Schema Evolution in SQL-99 and Commercial (Object-)Relational DBMS [chapter]

Can Türker
2001 Lecture Notes in Computer Science  
-An instance of a table schema, called table, is a set of rows where each row has the same structure as defined in the table schema, that is, each row the same number of columns and the values of the columns  ...  Examples for basic domains (built-in data types) in SQL-99 are INTEGER, REAL, NUMERIC, CHAR, or DATE.  ...  An important open issue concerns the consistency of a schema after performing a schema evolution operation.  ... 
doi:10.1007/3-540-48196-6_1 fatcat:n6hoxu4xi5ecfcmf2rlr2ln6le

Data Warehouse Architecture for DSS Applciations

V. J. Anand, Himawan Gunadhi
1996 Australasian Journal of Information Systems  
The warehouse database is a special component in the federation, made up of historical data, external data and materialized views of the operational data.  ...  We propose an architecture that is based on a federated database system extended to incorporate a materialized warehouse.  ...  ) ], and 2) transparent access to users -the system takes care of coordinating in splitting the query and subsequently combining the results.  ... 
doi:10.3127/ajis.v4i1.375 fatcat:cmfuzgh7kbckpemvpkpaaftddi

Recent Advances in Schema and Ontology Evolution [chapter]

Michael Hartung, James Terwilliger, Erhard Rahm
2010 Schema Matching and Mapping  
We introduce the major requirements for effective schema and ontology evolution, including support for a rich set of change operations, simplicity of change specification, evolution transparency (e.g.,  ...  by providing and maintaining views or schema versions), automated generation of evolution mappings, and predictable instance migration that minimizes data loss and manual intervention.  ...  -Transparency: Schema evolution should result into minimal or no degradation of availability or performance of the changed system.  ... 
doi:10.1007/978-3-642-16518-4_6 fatcat:nx56hsjqnzaedihtc7cthjqaby

Data and Query Adaptation Using DaemonX

Marek Polák, Martin Chytil, Karel Jakubec, Vladimir Kudelas, Peter Piják, Martin Necaský, Irena Holubová
2015 Computing and informatics  
In this paper we introduce DaemonX -an evolution management framework which enables to manage evolution of complex applications efficiently and correctly.  ...  The most common applications of the today's IT world are information systems. The problems related to their design and implementation have sufficiently been solved.  ...  ., schemas, which are usually mutually related or overlaid. In other words, each application of the system utilizes several views of a common problem domain.  ... 
dblp:journals/cai/PolakCJKPNH15 fatcat:mb5updxkdnbibhh2pcnff2bekm

Update rewriting and integrity constraint maintenance in a schema evolution support system

Carlo A. Curino, Hyun Jin Moon, Alin Deutsch, Carlo Zaniolo
2010 Proceedings of the VLDB Endowment  
DB Ensembl (410+ schema versions in 9 years), and Wikipedia (240+ schema versions in 6 years).  ...  In this paper, we address this issue by introducing a formal evolution model for the database schema structure and its integrity constraints, and use it to derive update mapping techniques akin to the  ...  in the general case, including: the view update problem [5] , deciding schema equivalence [28] , schema mapping composition [16] and inversion [17] , and consistent query answering [3] .  ... 
doi:10.14778/1921071.1921078 fatcat:hzbitzrp7zcezdt42izapwwf7m

Multi-Level Metadata Integration System: Xml, Rdf And Ruleml

Messaouda Fareh, Omar Boussaid, Rachid Challal
2012 Zenodo  
Our aim is to propose architecture for the heterogeneous sources metadata mediation, represented by XML, RDF and RuleML models, providing to the user the metadata transparency.  ...  on the global schema, each is designed to a source.  ...  Sub Query 1: for $c in doc ("RDF-source.xml")/ Medicals-Analysis for $a1 in $c/bio return {$a1} Sub Query 2: for $c in doc ("RuleML-source.xml")/ Medicals-Analysis for $a2 in $c/glyc return {$a2}  ... 
doi:10.5281/zenodo.1076899 fatcat:bkidw35q5rdhbbxo7cr5egyqty

Report on the second ACM workshop on hot topics in software upgrades (HotSWUp'09)

Tudor Dumitraş, Iulian Neamtiu, Eli Tilevich
2010 ACM SIGOPS Operating Systems Review  
For example, the technical discussions at HotSWUp'09 covered dynamic software updates, package management tools, database schema upgrades, upgrades of systems with real-time constraints, etc., and highlighted  ...  The Second ACM SIGPLAN Workshop on Hot Topics in Software Upgrades (HotSWUp'09) was held on 25 October 2009 in Orlando, FL.  ...  Finally, we would like to thank the authors of submitted and invited papers for providing the excellent content of the program and for their enthusiastic participation in the workshop.  ... 
doi:10.1145/1899928.1899948 fatcat:fzax6gqe75c35mhpgdegwbaoiq

Second ACM workshop on hot topics in software upgrades (HotSWUp 2009)

Tudor Dumitraş, Iulian Neamtiu, Eli Tilevich
2009 Proceeding of the 24th ACM SIGPLAN conference companion on Object oriented programming systems languages and applications - OOPSLA '09  
For example, the technical discussions at HotSWUp'09 covered dynamic software updates, package management tools, database schema upgrades, upgrades of systems with real-time constraints, etc., and highlighted  ...  The Second ACM SIGPLAN Workshop on Hot Topics in Software Upgrades (HotSWUp'09) was held on 25 October 2009 in Orlando, FL.  ...  Finally, we would like to thank the authors of submitted and invited papers for providing the excellent content of the program and for their enthusiastic participation in the workshop.  ... 
doi:10.1145/1639950.1639974 dblp:conf/oopsla/DumitrasNT09 fatcat:tmg6qdhgmjalpnof6lczrkc57m

Modularizing application and database evolution - an aspect-oriented framework for orthogonal persistence

Rui Humberto R. Pereira, J. Baltasar García Perez-Schofield, Francisco Ortin
2016 Software, Practice & Experience  
The main contribution of our work consists in finding transparent mechanisms for the support of database evolution in orthogonal persistent systems, reducing the programmers' work effort and enabling the  ...  Object-oriented database management systems like DB4O [8], Versant [9] and ObjectDB [10], provide transparent schema evolution mechanisms.  ...  From the point of view of applications, this is transparent, being a technical problem in the ODBMS.  ... 
doi:10.1002/spe.2415 fatcat:xh4dutfjcbgklakwzbulhhzrwu

Optimizing Performance of Schema Evolution Sequences [chapter]

Kajal T. Claypool, Chandrakant Natarajan, Elke A. Rundensteiner
2001 Lecture Notes in Computer Science  
While researchers have looked at the deferred execution approach for schema evolution in an effort to improve availability of the system, to the best of our knowledge ours is the first effort to provide  ...  web pages from data in database systems, or the integration of systems with different native data models.  ...  The authors would like to thank students at the Database Systems Research Group at WPI for their interactions and feedback on this research.  ... 
doi:10.1007/3-540-44677-x_8 fatcat:v6pyn5gdcjgvdd37vem2qhim6u
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