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Providing views and closure for the object data management group object model

M. Roantree, J.B. Kennedy, P.J. Barclay
1999 Information and Software Technology  
This paper describes our efforts to extend its relational style algebra, and to provide query closure and a viewing mechanism for OQL to construct multidatabase schemas.  ...  This research is focused on the viability of using the ODMG data model as a canonical data model in a multidatabase environment, and where weaknesses are identified we have proposed amendments to enable  ...  These are all characteristics required of multidatabase systems.  ... 
doi:10.1016/s0950-5849(99)00042-7 fatcat:djmsnyqjhbalvor3qcoanfxzfm

Multidatabase and Interoperable Systems

A.R. Hurson, M.W. Bright, A.R. Hurson, M.W. Bright
1995 Integrated Computer-Aided Engineering  
Multidatabase language systems (such as MRDSM) and federated databases (such as Heimbigner's system) suggested access language functions and partial global schemas (obtained through negotiation protocols  ...  Initial research interests focused on transformations between local data models and access languages to a different global data model and access language.  ... 
doi:10.3233/ica-1995-2101 fatcat:qhwj2aelr5c2lpckw6632gszu4

Automated resolution of semantic heterogeneity in multidatabases

M. W. Bright, A. R. Hurson, S. Pakzad
1994 ACM Transactions on Database Systems  
Global view definition and multidatabase languages-two approaches to database integration.  ...  Most globalschema multidatabases use a relational data model and some variant of SQL for the global-access language.  ... 
doi:10.1145/176567.176569 fatcat:4axaagteunfrvl5k3xsjsvcfnm

The Issues And Solutions Of Integrating DBMS To A Multi-DBMS

Leslie Leong
2011 Review of Business Information Systems (RBIS)  
The overall language of an MDBS for both data definition and manipulation was called a multidatabase language.  ...  The global system provides some means (global schema or multidatabase language) of resolving the differences in data representation and function between local DBMS" (p.5).  ... 
doi:10.19030/rbis.v7i2.4536 fatcat:fllbsvomanhtlmyz6mk5ymjpge


Jeong-Oog Lee, Doo-Kwon Baik
1999 Proceedings of the eighth international conference on Information and knowledge management - CIKM '99  
And we provide a semantic query language, SemQL, to capture the concepts about what users want.  ...  Another problem in multidatabase systems is allowing users to handle information from different databases that refer to the same realworld entity.  ...  Multidatabase language approach eliminates problems of global schema creation and maintenance, but presents a more complex global ihterface to the user.  ... 
doi:10.1145/319950.320011 dblp:conf/cikm/LeeB99 fatcat:26g6er3wfzhftgtvwxkb2fr75q

A parallel logic language for transaction specification in multidatabase systems

Eva Kühn, Ahmed K. Elmagarmid, Yungho Leu, Noureddine Boudriga
1995 Journal of Systems Integration  
Th.e second is the fact that none of the existing language and system support such a flexible model.  ...  These new capabilities are required in order to describe applications in a multidatabase environment [ELLR90] [LEB90J.  ...  It serves as a task specification and execution language for multidatabase activities. DOL is intended as a low level language.  ... 
doi:10.1007/bf01974950 fatcat:4qndoamxazdzrlwu34dilcrhcu

Data Integration in the Large: The Challenge of Reuse

Arnon Rosenthal, Leonard J. Seligman
1994 Very Large Data Bases Conference  
Much published research on data integration considers only a "one shot" effort to produce an integrated schema or a multidatabase query. This paper examines a more complex environment.  ...  This approach has the disadvantage of duplicating much of the transformational power of the query language in the intercomponent assertion language. 4 Toward Repositories for Data Integration in the Large  ...  We consider reuSe -ofmetadataandofcode-tobea major requirement for CASE tools for multidatabases. Tool vendors, when addressing multiple forms of integration, want to reuse code.  ... 
dblp:conf/vldb/RosenthalS94 fatcat:7pplapx4i5gzbntzuq3rqbxkfu

Query languages for relational multidatabases

John Grant, Witold Litwin, Nick Roussopoulos, Timos Sellis
1993 The VLDB journal  
A multidatabase system provides such a capability through a multidatabase manipulation language, such as MSQL.  ...  The connection between the multirelational languages and MSQL, the multidatabase version of SQL, is also investigated.  ...  A system for the manipulation of data in autonomous databases is called a multidatabase system (MDBS) and the corresponding language is called a multidatabase manipulation language (MML) (Litwin et  ... 
doi:10.1007/bf01232185 fatcat:m22mwz42kff75koyp7tojp4vfu

Context interchange

Michael Siegel, Stuart E. Madnick
1991 SIGMOD record  
The most basic requirement for the use of context for multidatabase systems is the existence of a common metadata vocabulary. 1 In [SM91] we define a rule-based language for metadata representation that  ...  This requires both representations, models, manipulation languages and reconciliation algorithms for context knowledge.  ... 
doi:10.1145/141356.141390 fatcat:etbpirj7ofds7c4s5ozu3kgd6u

A Multidatabase System as 4-Tiered Client-Server Distributed Heterogeneous Database System [article]

Mohammad Ghulam Ali
2009 arXiv   pre-print
In this paper, we describe a multidatabase system as 4tiered Client-Server DBMS architectures. We discuss their functional components and provide an overview of their performance characteristics.  ...  Transaction submitted from client interface to a multidatabase system server through an application server will be decomposed into a set of sub queries and will be executed at various remote heterogeneous  ...  Creating and maintaining the global schema, which requires the use of database integration techniques, is a critical issue in the multidatabase system.  ... 
arXiv:0912.0579v1 fatcat:dz76xllegjfjvmo4do5b7cecgm

Critical issues in multidatabase systems

Ahmed K. Elmagarmid, Marek Rusinkiewicz
1991 Information Sciences  
>S the directions of further research in the area of multidatabase systems.  ...  We also show how such a language can be used to specify global applications requiring access to multiple and autonomous software systems.  ...  The main problems currently under investip;ation include: • of all executioll l"nvironment for a multidatabase language such a.'  ... 
doi:10.1016/0020-0255(91)90090-h fatcat:cpnvunzqsfclljfp325egs3a7m

Integrity Constraint Enforcement in a Multidatabase using Distributed Active Rules [chapter]

L. G. Gomez, S. D. Urban
1998 Integrity and Internal Control in Information Systems  
Maintaining constraints in a distributed environment such as that of a multidatabase system provides an even more challenging task for active rule technology.  ...  Acknowledgments We would like to thank Sean Healy of the Multidatabase System group for his valuable comments and development work during the implementation of the prototype. 38  ...  Private and Public global constraints are expressed in a high level declarative language called the Multidatabase Constraint Specification Language (MCSL).  ... 
doi:10.1007/978-0-387-35396-8_2 fatcat:qvxf6ds5pnc5pd2m5jjj6b763u

A Multidatabase System for Tracking and Retrieval of Financial Data

Munir Cochinwala, John Bradley
1994 Very Large Data Bases Conference  
In this paper we define the characteristics of the application, the multidatabase system we used to support the applications and the extensions we made in t.he application to achieve the required functionality  ...  We have built a multidatabase system to support a financial application that stores historical data used by traders to identify trends in the market.  ...  Triggers in databases often are expressed by rules [ll, 15, 121 defined using languages such as relational query languages and object-oriented languages [ll] .  ... 
dblp:conf/vldb/CochinwalaB94 fatcat:7nmbxwyz7jacxhzkrtwgvuqj3u

Dynamic Query Optimization and Query Processing in Multidatabase Systems

Henryk Josinski
2000 International Conference on Extending Database Technology  
The functions of the local server are defined as follows: translation of the SQL queries into the language characteristic for the data processor (if required), -managing concurrent subtransactions in cooperation  ...  If the global query language is different from the query language of a component DBMS, then the subquery must be translated.  ... 
dblp:conf/edbt/Josinski00 fatcat:2biuzars3rdqfibhlwccgfv5su

Automating compensation in a multidatabase

Nodine, Zdonik
1994 Proceedings of the Twenty-Seventh Hawaii International Conference on System Sciences HICSS-94  
We examine two areas of multidatabase transaction management where compensation is required. The first is implementing compensation as a recovery technique when an open nested transaction is aborted.  ...  The second is in backing out the eflects of an atomic multidatabase transaction when some local database transaction commits before a global abort decision is made.  ...  This restriction is useful because it provides a uniform way of accessing the information in the multidatabase, independent of any local database's data manipulation language.  ... 
doi:10.1109/hicss.1994.323254 fatcat:rpu5ip6snnafdlrox6furifroe
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