Dissertations / Theses: 'Object-oriented databases'

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Li, Xue. "Schema evolution in object-oriented databases." Thesis, Queensland University of Technology, 1997.

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Rashid, Awais. "A database evolution approach for object oriented databases." Thesis, Lancaster University, 2001. http://eprints.lancs.ac.uk/11951/.

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Lakher, Alexander. "Object comprehension translation for object oriented databases." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0021/MQ47733.pdf.

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Chavda, Manoj. "Visually querying object-oriented databases." Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/17516.

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Bibliography: pages 141-145.
As database requirements increase, the ability to construct database queries efficiently becomes more important. The traditional means of querying a database is to write a textual query, such as writing in SQL to query a relational database. Visual query languages are an alternative means of querying a database; a visual query language can embody powerful query abstraction and user feedback techniques, thereby making them potentially easier to use. In this thesis, we develop a visual query system for ODMG-compliant object-oriented databases, called QUIVER. QUIVER has a comprehensive expressive power; apart from supporting data types such as sets, bags, arrays, lists, tuples, objects and relationships, it supports aggregate functions, methods and sub-queries. The language is also consistent, as constructs with similar functionality have similar visual representations. QUIVER uses the DOT layout engine to automatically layout a query; QUIVER queries are easily constructed, as the system does not constrain the spatial arrangement of query items. QUIVER also supports a query library, allowing queries to be saved, retrieved and shared among users. A substantial part of the design has been implemented using the ODMG-compliant database system O₂, and the usability of the interface as well as the query language itself is presented. Visual queries are translated to OQL, the standard query language proposed by the ODMG, and query answers are presented using O₂ Look. During the course of our investigation, we conducted a user evaluation to compare QUIVER and OQL. The results were extremely encouraging in favour of QUIVER.

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Coats, Sidney M. (Sidney Mark). "The Object-Oriented Database Editor." Thesis, University of North Texas, 1989. https://digital.library.unt.edu/ark:/67531/metadc500921/.

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Because of an interest in object-oriented database systems, designers have created systems to store and manipulate specific sets of abstract data types that belong to the real world environment they represent. Unfortunately, the advantage of these systems is also a disadvantage since no single object-oriented database system can be used for all applications. This paper describes an object-oriented database management system called the Object-oriented Database Editor (ODE) which overcomes this disadvantage by allowing designers to create and execute an object-oriented database that represents any type of environment and then to store it and simulate that environment. As conditions within the environment change, the designer can use ODE to alter that environment without loss of data. ODE provides a flexible environment for the user; it is efficient; and it can run on a personal computer.

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Khayundi, Peter. "A comparison of open source object-oriented database products." Thesis, University of Fort Hare, 2009. http://hdl.handle.net/10353/254.

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Object oriented databases have been gaining popularity over the years. Their ease of use and the advantages that they offer over relational databases have made them a popular choice amongst database administrators. Their use in previous years was restricted to business and administrative applications, but improvements in technology and the emergence of new, data-intensive applications has led to the increase in the use of object databases. This study investigates four Open Source object-oriented databases on their ability to carry out the standard database operations of storing, querying, updating and deleting database objects. Each of these databases will be timed in order to measure which is capable of performing a particular function faster than the other.

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Morsi, Magdi M. A. "Extensible object-oriented databases with dynamic schemas." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/9121.

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Carlsson, Anders. "Object oriented databases : a natural part of object oriented software development?" Thesis, Blekinge Tekniska Högskola, Institutionen för programvaruteknik och datavetenskap, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5824.

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The technology of object oriented databases was introduced to system developers in the late 1980?s. Despite that it is rarely used today. This thesis introduces the concept of object oriented databases as the purposed solution to the problems that exist with the use of relational databases. The thesis points to the advantages with storing the application objects in the database without disassembling them to fit a relational data model. Based on that advantages and the cost of introducing such a rarely used technology into a project, a guideline for when to use object oriented databases and when to use relational databases is given.
anders@actk.net

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Lee, J. J. "The object-oriented database and processing of electronic warfare data." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA303112.

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Polle, Torsten. "On representing relationships in object oriented databases." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=961959037.

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Wang, Lichun. "Query processing in temporal object-oriented databases." Thesis, Middlesex University, 1999. http://eprints.mdx.ac.uk/6321/.

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This PhD thesis is concerned with historical data management in the context of objectoriented databases. An extensible approach has been explored to processing temporal object queries within a uniform query framework. By the uniform framework, we mean temporal queries can be processed within the existing object-oriented framework that is extended from relational framework, by extending the existing query processing techniques and strategies developed for OODBs and RDBs. The unified model of OODBs and RDBs in UmSQL/X has been adopted as a basis for this purpose. A temporal object data model is thereby defined by incorporating a time dimension into this unified model of OODBs and RDBs to form temporal relational-like cubes but with the addition of aggregation and inheritance hierarchies. A query algebra, that accesses objects through these associations of aggregation, inheritance and timereference, is then defined as a general query model /language. Due to the extensive features of our data model and reducibility of the algebra, a layered structure of query processor is presented that provides a uniforrn framework for processing temporal object queries. Within the uniform framework, query transformation is carried out based on a set of transformation rules identified that includes the known relational and object rules plus those pertaining to the time dimension. To evaluate a temporal query involving a path with timereference, a strategy of decomposition is proposed. That is, evaluation of an enhanced path, which is defined to extend a path with time-reference, is decomposed by initially dividing the path into two sub-paths: one containing the time-stamped class that can be optimized by making use of the ordering information of temporal data and another an ordinary sub-path (without time-stamped classes) which can be further decomposed and evaluated using different algorithms. The intermediate results of traversing the two sub-paths are then joined together to create the query output. Algorithms for processing the decomposed query components, i. e., time-related operation algorithms, four join algorithms (nested-loop forward join, sort-merge forward join, nested-loop reverse join and sort-merge reverse join) and their modifications, have been presented with cost analysis and implemented with stream processing techniques using C++. Simulation results are also provided. Both cost analysis and simulation show the effects of time on the query processing algorithms: the join time cost is linearly increased with the expansion in the number of time-epochs (time-dimension in the case of a regular TS). It is also shown that using heuristics that make use of time information can lead to a significant time cost saving. Query processing with incomplete temporal data has also been discussed.

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Higgins, Christopher Paul. "Logic and databases : an object oriented approach." Thesis, University of York, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317651.

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Woo, Shan Ming 1975. "Lazy type changes in object-oriented databases." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86428.

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Hwang, Deborah Jing-Hwa. "Function-based indexing for object-oriented databases." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36453.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
Includes bibliographical references (p. 167-171).
by Deborah Jing-Hwa Hwang.
Ph.D.

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Cheung, Yin 1976. "Lasy schema evolution in object-oriented databases." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/86788.

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Kesim, Fehime Nihan. "Temporal objects in deductive databases." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321884.

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Hon, Wing-Keung. "The next generation of database : object-oriented database." Virtual Press, 1994. http://liblink.bsu.edu/uhtbin/catkey/917035.

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As some new computer applications, such as computer-aided design, multimedia systems, and knowledge-based systems, require more complex data structures, the traditional database system seems to be unable to support these new requirements. A recently developed database technology, object-oriented database, provides a solution to these problems.The purpose of this thesis is to investigate what is object-oriented database, especially in its internal organization such as object persistency. Two object-oriented database systems, EXODUS and ODE, are discussed in detail. In addition, a comparison between the relational databases and object-oriented databases is made.
Department of Computer Science

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Hines, Gary L. "From entities to objects : reverse engineering a relational data model into an object-oriented design." Virtual Press, 2000. http://liblink.bsu.edu/uhtbin/catkey/1164846.

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In many software applications, an object-oriented design (OOD) is generated first, then persistent storage is implemented by mapping the objects to a relational database. This thesis explores the "reverse engineering" of an OOD out of an existing relational data model. Findings from the current literature are presented, and a case study is undertaken using the model and research process published by GENTECH, a nonprofit organization promoting genealogical computing. The model is mapped into an OOD and captured in Unified Modeling Language (UML) class diagrams and object collaboration diagrams. The suitability of the example OOD is evaluated against the GENTECH research process using UML use cases and sequence diagrams. The mapping of relational database designs into OODs is found to be suitable in certain instances.
Department of Computer Science

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Hansen, David Marshall. "An object oriented heterogeneous database architecture /." Full text open access at:, 1995. http://content.ohsu.edu/u?/etd,196.

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Willshire, Mary Jane. "The effects of inheritance on the properties of physical storage models in object oriented databases." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/9236.

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Nagy, Victor. "Performance Analysis of Relational Databases, Object-Oriented Databases and ORM Frameworks." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-9528.

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In the planning stage of web and software development, it is important to select the right tool for the job. When selecting the database to use, relational databases like MySQL is a popular choice. However, relational databases suffer by object-relational impedance mismatch. In this work we will explore the response time of relational and object-oriented databases and the overhead of ORM frameworks. This will be done by creating a web application that receives data about flights and airports from a client, which measures the response time of the databases and the entire request. It was found that MySQL has the lowest response time, while the ORM framework Hibernate adds an overhead on some of the tests while performing similar to MySQL. Db4o had the highest response time in a majority of the tests. In future works, this study could be extended by other tests or by other type of databases.

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Antunes, Fernandes Alvaro Adolfo. "An axiomatic approach to deductive object-oriented databases." Thesis, Heriot-Watt University, 1995. http://hdl.handle.net/10399/773.

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Owens, John. "Using object-oriented databases to model hydrocarbon reservoirs." Thesis, University of Aberdeen, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262174.

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Hydrocarbon reservoir modelling plays a central role in the exploration and production of reservoirs. This thesis describes significant improvements in the way that data and knowledge about reservoir modelling is used in comparison with other attempts at such modelling. This thesis describes the development of a flexible reservoir modelling environment which allows users to apply their own knowledge in order to influence the modelling process. The modelling environment allows users to explore their own 'What if ...' hypotheses. A Smalltalk/V functional data model has been used as a front end to an object-oriented database (P/FDM). A technique called transparent object migration has been developed which allows objects from P/FDM to be reconstructed in the Smalltalk/V functional data model. The thesis describes how users can configure their own stochastic modelling algorithms. Common stages in stochastic modelling algorithms have been isolated and a number of alternatives developed for each stage. This has been implemented in an object-oriented architecture which allows users to configure their own algorithms from the re-usable parts supplied. A graphical probability distribution function editor has been developed. This provides a graphical representation of a probability distribution function which can be easily modified by the user, without the user having to provide a quantitative description of the changes that are required. By using this technique as part of a feedback loop, the user can develop reservoir models which they have more belief in.

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Ng, Tony Chun Tung. "Efficient garbage collection for large object-oriented databases." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38833.

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Auepanwiriyakul, Raweewan. "Inheritance Problems in Object-Oriented Database." Thesis, University of North Texas, 1989. https://digital.library.unt.edu/ark:/67531/metadc330898/.

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This research is concerned with inheritance as used in object-oriented database. More specifically, partial bi-directional inheritance among classes is examined. In partial inheritance, a class can inherit a proper subset of instance variables from another class. Two subclasses of the same superclass do not need to inherit the same proper subset of instance variables from their superclass. Bi-directional partial inheritance allows a class to inherit instance variables from its subclass. The prototype of an object-oriented database that supports both full and partial bi-directional inheritance among classes was developed on top of an existing relational database management system. The prototype was tested with two database applications. One database application needs full and partial inheritance. The second database application required bi-directional inheritance. The result of this testing suggests both advantages and disadvantages of partial bi-directional inheritance. Future areas of research are also suggested.

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Gibson, Mark G. "The need for object-oriented systems to extend or replace the relational database model to solve performance problems." Virtual Press, 1992. http://liblink.bsu.edu/uhtbin/catkey/834637.

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The relational model has dominated the database field because of its reduced application development time and non-procedural data manipulation features. It has significant problems, however, including weak integrity constraints. This paper discusses the need for object oriented techniques to improve on these flaws. Three existing DBMS will be discussed: IRIS, ORION, and OZ.
Department of Computer Science

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Jin, Jian Carleton University Dissertation Computer Science. "A framework for characterizing an object-oriented database system." Ottawa, 1992.

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Ghemawat, Sanjay. "The modified object buffer : a storage management technique for object-oriented databases." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/37012.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
Includes bibliographical references (p. 113-117).
by Sanjay Ghemawat.
Ph.D.

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Mondini, Fabio Massimo. "The role of object-oriented databases in project management." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11666.

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LeBlanc, Marc André. "Fine-grained disk space accounting for object-oriented databases." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36313.

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Roy, Brian K. "Understanding object-oriented methodology." Master's thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-03172010-020122/.

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Theologitis, Vassilios. "Private and shared data in object-oriented programming." Thesis, Monterey, Calif. : Naval Postgraduate School, 1992. http://handle.dtic.mil/100.2/ADA253070.

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Thesis (M.S. in Computer Science)--Naval Postgraduate School, March 1992.
Thesis Advisor: Nelson, Michael L. "March 1992." Includes bibliographical references (p. 158-161). Also available in print.

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Norrie, Moira C. "A collection model for data management in object-oriented systems." Thesis, University of Glasgow, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283835.

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Norcio, Sheila Azadeh. "Object-oriented and relational databases : a comparative study of concepts and applications /." Master's thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-01202010-020128/.

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Kwok, Chee Khan. "Simulation of distributed object oriented servers." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FKwok%5fC.pdf.

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Armstrong, K. "DT : an iconic graphical user interface for object-oriented databases." Thesis, Lancaster University, 1999. http://eprints.lancs.ac.uk/11681/.

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Souza, Fernando da Fonseca de. "A platform for implementing object-oriented databases based on KBZ." Thesis, University of Kent, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293979.

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Diaz, Garcia Oscar. "Making object-oriented databases more knowledgeable (from ADAM to ABEL)." Thesis, University of Aberdeen, 1991. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU034240.

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Object Oriented Data Bases (OODBs) have been proposed both for coping with the impedance mismatch problem and for increasing the semantic details kept in the Data Base by collecting not only the structural features of the application but the behavioural ones as well. This is achieved by including procedures (called methods) within schema definition. However, methods have sometimes been overused in the sense that the code encapsulated refers not only to how the operation is implemented but also to other kinds of knowledge that is implicit in the code. As a result, not only is it more difficult to update the system, but its ease of use, legibility and inferential power are also diminished. The aim of this work is to provide a set of primitives to represent knowledge explicity in an OOBD. Until now, much of this knowledge was implicit in method code, and so could not be used for other purposes. The focus is on three different kinds of knowledge, namely integrity constraints, user-defined relationships and active behaviour. Integrity constraints are declaratively specified as an additional facet of the attributes. Relationships are seen as 'first-class' objects where novel features such as inferred properties and the operational semantics of the relationship are supported. Finally, active behaviour is provided by introducing active rules. Here the principal contribution lies in representing as an object not only the rules but also the rule manager. Hence, future requirements can be supported by specialising the current rule manager. This has been born out by an implementation in ADAM, an OODB in Prolog. It has to be emphasised that this extension has been made in an object oriented fashion by using metaclasses. The resulting system is called ABEL (ABerdeen Euskadi data modeL) which is intended as a successor of ADAM.

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Worrall, Basil Graeme. "The importance of abstraction in the development of distributed and cross-platform frameworks." Pretoria: [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-11292009-082341/.

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Shin, Dongil. "A Unifying Version Model for Objects and Schema in Object-Oriented Database System." Thesis, University of North Texas, 1997. https://digital.library.unt.edu/ark:/67531/metadc279222/.

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There have been a number of different versioning models proposed. The research in this area can be divided into two categories: object versioning and schema versioning. In this dissertation, both problem domains are considered as a single unit. This dissertation describes a unifying version model (UVM) for maintaining changes to both objects and schema. UVM handles schema versioning operations by using object versioning techniques. The result is that the UVM allows the OODBMS to be much smaller than previous systems. Also, programmers need know only one set of versioning operations; thus, reducing the learning time by half. This dissertation shows that UVM is a simple but semantically sound and powerful version model for both objects and schema.

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Samos, Jiménez José. "Definition of external schemas and derived classes in object oriented databases." Doctoral thesis, Universitat Politècnica de Catalunya, 1997. http://hdl.handle.net/10803/6633.

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El principal objetivo de esta tesis es ampliar el estudio de los esquemas externos en BDOO, en particular, su proceso de definición. Una nueva metodología de definición de esquemas externos que simplifica considerablemente dicho proceso y los resultados obtenidos es presentada. Se considera como referencia el entorno ANSI/SPARC. Los sistemas de definición del esquema conceptual y los esquemas externos están basados en un diccionario de datos.

En BDOO, los esquemas externos pueden contener clases del esquema conceptual así como clases derivadas definidas a partir de clases previamente existentes (derivadas o no); las clases derivadas ofrecen vistas de la información contenida en las clases a partir de las que son definidas. La definición de clases derivadas es una cuestión importante en la definición de esquemas externos en BDOO. Por tanto, éste es el segundo tema de investigación. Dos de los problemas principales de la definición de clases derivadas son estudiados: La generación de identificadores para los objetos de las clases derivadas, y la transmisión de modificaciones entre los objetos de las clases derivadas y los de las clases a partir de los que son definidos.

Uno de los usos principales de los esquemas externos es proporcionar un mecanismo que soporte la simulación de cambios del esquema. La información en los esquemas externos ha de ser derivada a partir del esquema conceptual; el tipo de cambios del esquema que pueden ser simulados usando esquemas externos es condicionado por este hecho. Por tanto, el tercer objetivo es presentar un mecanismo que soporte la simulación de un espectro más amplio de cambios en el esquema. Este mecanismo está basado en la definición de esquemas externos pero incorpora ampliaciones adicionales. Para proporcionar mayor flexibilidad en este área, proponemos la definición de clases derivadas que puedan contener información no derivada en su intensión y extensión. Cuando un esquema externo con información no derivada ha de ser definido, el esquema conceptual ha de ser modificado para incluir la información no derivada del nuevo esquema. Para evitar modificaciones innecesarias del esquema conceptual el uso de un entorno de prueba para la definición de esquemas externos temporales es propuesto.
The main target of this thesis is to broaden the study of external schemas in OODBs, in particular, the external schema definition process. A new external schema definition methodology that considerably simplifies the process of definition and the results obtained, is presented. The ANSI/SPARC framework is taken as a reference. The systems of conceptual and external schema definition are based on a data dictionary.

In OODBs, external schemas can contain classes from the conceptual schema as well as derived classes defined from previously existing classes (derived or non-derived); derived classes offer views of the information contained in the classes from which they are defined. The definition of derived classes is an important issue in the definition of external schemas in OODBs. Therefore, the definition of derived classes is the second focus of research. Two of the main problems of defining derived classes are studied: the generation of identifiers for the objects of the derived classes; and the transmission of modifications between the objects of the derived classes and those of the classes from which they are defined.

One of the main uses of external schemas is to provide a mechanism that supports the simulation of schema changes. Information in external schemas has to be derived from the conceptual schema; the kind of schema changes that can be simulated using external schemas is conditioned by this fact. Therefore, the third target is to present a mechanism that supports the simulation of a wider spectrum of schema changes. This mechanism is based on the definition of external schemas but incorporates some additional extensions. In order to provide more flexibility in this area, we propose the definition of derived classes that can contain non-derived information in their intension as well as in their extension: partially derived classes. When an external schema with non-derived information is to be defined, the conceptual schema has to be modified in order to include the non-derived information of the new schema. In order to avoid unnecessary modifications of the conceptual schema the use of a test environment for the definition of temporal external schemas is also proposed.

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Nyström, Mattias. "Engineering information integration and application development using object-oriented mediator databases /." Luleå, 2003. http://epubl.luth.se/1402-1544/2003/04.

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Abdelmoty, El-Hetw Alia Ibrahim. "Modelling and reasoning in spatial databases : a deductive object-oriented approach." Thesis, Heriot-Watt University, 1995. http://hdl.handle.net/10399/615.

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Chelouche, Evyatar. "Using object-oriented databases for implementation of Interactive Electronic Technical Manuals." Thesis, Monterey, Calif. : Naval Postgraduate School, 1992. http://handle.dtic.mil/100.2/ADA248135.

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Rothenberger, James A. "Using object-oriented technology in the design of an integrated circuit macrocell registration database." Instructions for remote access. Click here to access this electronic resource. Access available to Kutztown University faculty, staff, and students only, 1999. http://www.kutztown.edu/library/services/remote_access.asp.

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Thesis (M.S.)--Kutztown University of Pennsylvania, 1999.
Source: Masters Abstracts International, Volume: 45-06, page: 3192. Typescript. Abstract precedes thesis as preliminary leaf. Includes bibliographical references (leaves 73-74).

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Chatterjee, Raja. "KBMS-based evolutionary prototyping of object-oriented software systems /." CLICK ON LINK, THEN SEARCH BY AUTHOR OR TITLE; ACCESS RESTRICTED TO COMPUTERS ON UF CAMPUS OR WITH UF IP ADDRESSES, 1998. http://wwwlib.umi.com/cr/ufl/main.

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Thesis (Ph. D.)--University of Florida, 1998.
Typescript. Vita. Includes bibliographical references (leaves 115-118). Full text also available from UMI Current Research @ database; Adobe Acrobat Reader required to display text; see LINKS to connect

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Qian, Yihong. "DMAS : a Display Measurement and Analysis System with an object-oriented database /." This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06112009-063840/.

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Calsavara, Alcides. "Constructing highly-available distributed metainformation systems." Thesis, University of Newcastle Upon Tyne, 1996. http://hdl.handle.net/10443/1956.

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This thesis demonstrates the adequacy of an object-oriented approach to the construction of distributed metainformation systems: systems that facilitate information use by maintaining some information about the information. Computer systems are increasingly being used to store information objects and make them accessible via network. This access, however, still relies on an adequate metainformation system: there must be an effective means of specifying relevant information objects. Moreover, distribution requires the metainformation system to cope well with intermittent availability of network resources. Typical metainformation systems developed to date permit information objects to be specified by expressing knowledge about their syntactic properties, such as keywords. Within this approach, however, query results are potentially too large to be transmitted, stored and treated, at reasonable cost and time. Users are therefore finding it difficult to navigate their way through the masses of information available. In contrast, this thesis is based on the principle that a metainformation system IS more effective if it permits information objects to be specified according to their semantic properties, and that this helps managing, filtering and navigating information. Of particular interest is object orientation because it is the stateof- the-art approach to both the representation of information semantics and the Abstract 11 design of reliable systems. The thesis presents the design and implementation of a programming toolkit for the construction of metainformation systems, where information objects can be any entity that contains information, the notion of views permits organising the information space, transactional access is employed to obtain consistency, and replication is employed to obtain high availability and scalability.

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Bowen, Brian A. "Augmenting the relational model with conceptual graphs." Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/10426.

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While the relational model for data storage is sufficient for the modelling and manipulation of a large number of application domains, a growing class of application domains are either difficult or impossible for the relational model to deal with efficiently. The realisation of this fact has led to a proliferation of data models that attempt to increase the complexity and semantic capture of the domains that they can model - the development of object-oriented databases and the various semantic data models are a result of this. The idea of using logic to define, manipulate and constrain data has given rise to large numbers of systems that interface - not always successfully - a database system and a logic processing system. Most such systems are based on Prolog or its derivations. This thesis describes the development and use of an object-oriented and semantically rich form of logic - conceptual graph theory - as a system for the definition, manipulation, and constraint of data. It describes a theoretical correspondence between conceptual graph theory and the relational model, and proceeds to develop an augmented, hybrid theory that is formally more expressive and as rigorous as those languages based on the relational algebra or calculus. This thesis also describes the design and implementation of a hybrid relational database - conceptual graph system, that has a cleaner and more principled system of semantic capture than other (for example, Prolog-based) systems, and that is also adaptive in nature - it automatically modifies its underlying storage structures in accordance with modifications made to the structures of the application domain over time. This completely shields the user from any responsibility for database design and maintenance, and so the user need only be concerned with application domain knowledge. Although the implementation described is incomplete, it can be extended to produce a deductive, object-oriented database system based on conceptual graphs.

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Nguyen, Thuy-Linh 1964. "An object-oriented data model for evolvable Web systems." Monash University, School of Computer Science and Software Engineering, 2000. http://arrow.monash.edu.au/hdl/1959.1/9008.

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Dissertations / Theses on the topic 'Object-oriented databases'

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