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16th International Database Engineering and Applications Symposium, IDEAS 2012

作者： Roberts, Patricia School of Computing Engineering and Mathematics University of Brighton Lewes Road Brighton United Kingdom

ISBN: (纸本)9781450312349

object-relational databases (ORDB) can be created with a mixture of relational and object-oriented features, giving database designers a wide range of options. However, a poor combination of choices can result in problems with storing, retrieving or updating data. This paper shows that decisions about the features to use in ORDB design require a holistic approach, considering the database design as a whole and as part of an information system. We highlight problems that occur with some combinations of features that can cause poor functionality. Copyright © 2012 ACM.

关键词： object-oriented databases

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SOOD: A simulation tool for OODB

SOOD: A simulation tool for OODB

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2012 IEEE Global Engineering Education Conference, EDUCON 2012

作者： Wyne, Mudasser F. School of Engineering Technology and Media Systems National University San Diego United States

ISBN: (纸本)9781467314572

As a result of the wide acceptance of object-oriented database systems, performance related issues become a crucial factor in the success of object-oriented database systems. To improve performance the database system architecture and data structures, are designed accordingly. In this paper we design and develop a simulation tool based on the object oriented concept implementing class hierarchy and composite class hierarchy. A new simulation tool for object oriented databases entitled SOOD, is proposed in this paper, provides the flexible environment for defining, modifying and simulating the components of a OODB management system architecture. Thus providing a platform to plug-in different protocols and measures their performance under different conditions. It also enables users to customize and extend the framework to add more functionality or adapt simulation behavior as required. In particular, SOOD simulation tool represents a tool to highlight the strength and weakness and evaluate new architectural components in a relatively short time. © 2012 IEEE.

关键词： object-oriented databases

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Fundamentals of object databases: object-oriented and object-Relational Design

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Synthesis Lectures on Data Management 2011年第1期2卷 1-173页

作者： Dietrich, Suzanne W. Urban, Susan D. Arizona State University United States Texas Tech University United States

ISBN: (纸本)9781608455379

object-oriented databases were originally developed as an alternative to relational database technology for the representation, storage, and access of non-traditional data forms that were increasingly found in advanced applications of database technology. After much debate regarding object-oriented versus relational database technology, object-oriented extensions were eventually incorporated into relational technology to create object-relational databases. Both object-oriented databases and object-relational databases, collectively known as object databases, provide inherent support for object features, such as object identity, classes, inheritance hierarchies, and associations between classes using object references. This monograph presents the fundamentals of object databases, with a specific focus on conceptual modeling of object database designs. After an introduction to the fundamental concepts of object-oriented data, the monograph provides a review of object-oriented conceptual modeling techniques using side-by-side Enhanced Entity Relationship diagrams and Unified Modeling Language conceptual class diagrams that feature class hierarchies with specialization constraints and object associations. These object-oriented conceptual models provide the basis for introducing case studies that illustrate the use of object features within the design of object-oriented and object-relational databases. For the object-oriented database perspective, the object Data Management Group data definition language provides a portable, language-independent specification of an object schema, together with an SQL-like object query language. LINQ (Language INtegrated Query) is presented as a case study of an object query language together with its use in the db4o open-source object-oriented database. For the object-relational perspective, the object-relational features of the SQL standard are presented together with an accompanying case study of the object-relational features of Oracl

关键词： object-oriented databases

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All Your Database Are Belong to Us

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COMMUNICATIONS OF THE ACM 2012年第9期55卷 54-60页

作者： Meijer, Erik TUDelft Delft Netherlands

In the big open world of the cloud, highly available distributed objects will rule.

关键词： DATABASE design object-oriented databases object-oriented methods (Computer science) CLOUD computing ABSTRACT data types (Computer science) DATA DEVELOPMENT of application software

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Based on the object-oriented database ontology storage method research

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Advances in Information Sciences and Service Sciences 2012年第15期4卷 383-389页

作者： Jianwu, Xue Yi, Bai Management college of Northwestern Polytechnical University Xi'an Shaanxi 710072 China

The sharing of ontology resources works on the premise that the ontology can be stored effectively and reasonably. This paper compares with the traditional ontology storage mode according to the characteristics of the object oriented database and designs the ontology storage method based on the object-oriented database. Taking the aviation weapon as an example, this research verifies the method through the realization of "Based on object-oriented Database Ontology Storage System".

关键词： object-oriented databases

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Transforming object-oriented databases into XML

Transforming object-oriented Databases into XML

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IEEE International Conference on Information Reuse and Integration (IRI-2007)

作者： Naser, Taher Kianmehr, Keivan Alhajj, Reda Ridley, Mick J. Univ Bradford Sch Informat Bradford W Yorkshire England Univ Calgary Dept Comp Sci Calgary AB Canada Global Univ Dept Comp Sci Beirut Lebanon

ISBN: (纸本)9781424414994

This paper presents a novel approach to transform an existing object-oriented database into XML. The major motivation to carry out this study is the fact that it is necessary to facilitate platform independent exchange of the content of object oriented databases. There are more common features between the object-oriented model and XML and thus the mapping from object-oriented databases into XML is less problematic. To achieve the mapping, what we call the object graph is derived based on characteristics of the object-oriented schema;it simply summarizes and includes all nesting and inheritance links, which are the basics of the object-oriented model. Then, the inheritance is simulated in terms of nesting to get a simulated object graph. This way, everything in a simulated object graph is directly representable in XML format. Finally, we handle the mapping of the actual data from the object-oriented database into corresponding XML document(s).

关键词： object-oriented databases

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Applying aspect-oriented programming for instance adaptation in object-oriented databases

Applying aspect-oriented programming for instance adaptation...

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15th International Conference on Advanced Computing and Communications

作者： Kuppuswami, S. Palanivel, K. Amouda, V. Pondicherry Univ Dept Comp Sci Pondicherry 605014 India Pondicherry Univ Comp Ctr Pondicherry 605014 India Pondicherry Univ Ctr Bioinformat Pondicherry 605014 India

ISBN: (纸本)9780769530598

Developing object-oriented database for web applications may not remain constant and may vary to a large extent due to a variety of reasons like correcting mistakes, adding new features or any changes in the structure of the real world artifacts modeled in the database. Class versioning is one of the evolution strategy employed that addressing the above issues. The existing strategy for instance adaptation introduces the adaptation code directly into the class versions upon evolution, Consequently, if the behavior of a routine needs to be changed and maintenance has to be performed on all the class versions it was introduced. A new approach for instance adaptation is achieved by encapsulating the instance adaptation code through aspects - abstractions introduced by aspect-oriented programming that localize cross-cutting concerns. A web-based student database system was developed with different versions and the versioning problem was solved using update/backdate aspects with selective lazy conversion. The update/backdate aspects are invoked whenever version incompatibility arises and selective lazy conversion aspect is invoked when the condition for converting objects into new version is satisfied and this converts only a subset of the old version objects into new version.

关键词： object-oriented databases

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Construction of ontologies from object-oriented database models

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INTEGRATED COMPUTER-AIDED ENGINEERING 2011年第4期18卷 327-347页

作者： Zhang, Fu Ma, Z. M. Yan, Li Northeastern Univ Coll Informat Sci & Engn Shenyang 110819 Peoples R China Northeastern Univ Sch Software Shenyang 110819 Peoples R China

The Semantic Web aims at creating ontology-based and machine-processable Web content, and thus the success and proliferation of the Semantic Web depends on quickly and cheaply constructing Web ontologies. Currently, huge amounts of data are stored in database systems. Therefore, constructing ontologies by extracting domain knowledge from databases will facilitate the development of Web ontologies. In this paper, we develop a formal approach and an automated tool for constructing ontologies from object-oriented database models (OODMs). Firstly, we propose a kind of formal definition of OODMs and give the semantic interpretation of OODMs, where we consider both the structural and dynamic aspects of OODMs. Then, we give the ontology definition, in which the ontology is formulated in OWL DL language and consists of the ontology structure and instances. On this basis, we propose a formal approach that can transform an OODM and its corresponding database instances into the ontology structure and instances, respectively. Furthermore, following the proposed approach, we implement a prototype transformation tool called OODB2OWL, which can automatically construct ontologies by extracting knowledge stored in object-oriented databases db4o. Finally, based on the constructed ontologies, and in order to show the perspectives on how the constructed ontologies may be useful for improving some database applications, we investigate how to reason on OODMs (e.g., consistency, satisfiability, subsumption, and redundancy) by the reasoning mechanism of ontologies, which would help to improve some database applications and construct ontologies more exactly.

关键词： SEMANTIC computing MATHEMATICAL models object-oriented databases SEMANTIC Web INFORMATION services INFORMATION technology object-oriented programming (Computer science)

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A Novel Framework for Storage, Analysis and Integration through Mediation of Large-scale Electrophysiological Data

A Novel Framework for Storage, Analysis and Integration thro...

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5th International IEEE Engineering-in-Medicine-and-Biology-Society (EMBS) Conference on Neural Engineering (NER)

作者： Ljungquist, Bengt Petersson, Per Schouenborg, Jens Johansson, Anders J. Garwicz, Martin Lund Univ Neuronano Res Ctr S-22184 Lund Sweden

ISBN: (纸本)9781424441419

We present a framework based on object orientation with novel principles for how to store, analyze and integrate electrophysiological data. These principles are: (I) Using a Decorator pattern for storing analysis data in an object model, (II) using a Core Classes data structure for integration through mediation in a service bus architecture, and (III) choosing the single unit as the finest structure of the object model. With these principles, we address the problems of (1) how to relate the analysis data to the original electrophysiological data by utilizing design patterns, (2) how to integrate data from different data sources, both at application and organization levels and (3) avoiding performance problems by choosing the correct level of object granularity for the data.

关键词： Data models Data structures databases Electrophysiology MATLAB Mathematical model object oriented modeling RDBMS bioelectric phenomena core classes data structure data analysis data analysis data integration data storage data structures decorator pattern large-scale electrophysiological data medical information systems neuroinformatics neurophysiology object orientation based framework object-oriented databases relational database management systems relational databases service bus architecture

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Multi-level continuous skyline queries (MCSQ)

Multi-level continuous skyline queries (MCSQ)

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2nd International Conference on Data and Knowledge Engineering, ICDKE 2011

作者： El-Dawy, Eman Mokhtar, Hoda M. O. El-Bastawissy, Ali Faculty of Computers and Information Cairo University Cairo Egypt

ISBN: (纸本)9781457708640

Most of the current work on skyline queries mainly dealt with querying static query points over static data sets. With the advances in wireless communication, mobile computing, and positioning technologies, it has become possible to obtain and manage (model, index, query, etc.) the trajectories of moving objects in real life, and consequently the need for continuous skyline query processing has become more and more pressing. In this paper, we address the problem of efficiently maintaining continuous skyline queries which contain both static and dynamic attributes. We present a Multi-level Continuous Skyline Query (MCSQ) algorithm, which basically creates a pre-computed skyline data set, facilitates skyline update, and enhances query running time and performance. Our algorithm in brief proceeds as follows: First, we distinguish the data points that are permanently in the skyline and use them to derive a search bound. Second, we establish a pre-computed data set for dynamic skyline that depends on the number of skyline levels (M) which is later used to update the first (initial) skyline points. Finally, every time the skyline needs to be updated we use the pre-computed data sets of skyline to update the previous skyline set and consequently updating first skyline. Finally, we present experimental results to demonstrate the performance and efficiency of our algorithm. © 2011 IEEE.

关键词： object-oriented databases

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