Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

Topic: Object-relational model

    Note: these results are not from the primary (high quality) database.

Ads by Google

Related Topics

model person

Standard Model

OSI model

mathematical model

model airplanes

relational model

business model

model railway

Unified Modeling Language

model theory

fashion model

Beretta 92 Models

In the News (Wed 30 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

Object Database vs. Object-Relational Databases For an object-oriented application involving complex data relationships to work with a relational or object relational database, code must be written to map the complex object structure into the simple storage model of the relational database. The object model used by the Object Database Management Group in its ODMG-93 standard is derived from the OMG Common Object Model, and the model has been supplemented with bindings for C++, Smalltalk, and Java as well as Object Definition Language (ODL, based on OMG's IDL), the aforementioned OQL, meta-object access, and object interchange. The object referred to by the end user in the statement of requirements can be the same object represented in the model of the application in an analysis and design tool (e.g., Rational Rose), in the software code, and -- if an ODBMSs is used -- in the database. www.ca.com /products/jasmine/analyst/idc/14821E.htm   (8082 words)

Object/Relational Mapping I made a template which creates a typed object model based on the generic object model. If I was planning on using the "building SQL using strings" approach than my story would be done here. I had a look at CodeSmith's SchemaExplorer (which BTW has a slick object model) but couldn't use it because it's use was primarly to discover the database schema at runtime. Making the SQL typed would mean that there should be some object model in place that, for starters, allows you to represent the database objects (think views, tables, columns,...). Datasets, and in particular the typed flavor, come to mind. weblogs.asp.net /yreynhout/category/1751.aspx/rss   (930 words)

Object Database vs. Object-Relational Databases For an object-oriented application involving complex data relationships to work with a relational or object relational database, code must be written to map the complex object structure into the simple storage model of the relational database. The object model used by the Object Database Management Group in its ODMG-93 standard is derived from the OMG Common Object Model, and the model has been supplemented with bindings for C++, Smalltalk, and Java as well as Object Definition Language (ODL, based on OMG's IDL), the aforementioned OQL, meta-object access, and object interchange. The object referred to by the end user in the statement of requirements can be the same object represented in the model of the application in an analysis and design tool (e.g., Rational Rose), in the software code, and -- if an ODBMSs is used -- in the database. www.ca.com /products/jasmine/analyst/idc/14821E.htm   (930 words)

Objects integrated into the Relational Model For this to fit with the relational model we will enhance Domains to be able to take their "values" from a pool of existing objects or to be able to create a new object when asked. Predicate logic is quite good at describing the state of the world (or of a model of the world), so relational databases must be quite good at describing the state of an object model. This chapter has presented a correct integration of objects into the relational model. www.chimu.com /publications/objectRelational/part0005.html   (1188 words)

DBMS Interview - October 1994 As a consequence, all the shortcomings of SQL are regarded as shortcomings of the relational model. The second manifesto certainly agrees that we must not discard the relational model, but then goes on to say that the relational model means SQL and that we have to live with SQL forever and ever. I want the vendors to support the relational model properly, including the extension - which is actually not an extension at all - of domains done right meaning they can be data types of arbitrary complexity. www.dbmsmag.com /int9410.html   (5665 words)

Object-relational mapping - PHP Wiki The term object/relational mapping (ORM) refers to the technique of mapping a data representation from an object model to a relational data model with a SQL-based schema. Metastorage is an application that automatically generates code for an Object Oriented API for PHP 4, PHP 5 or later to store, retrieve and manipulate the data objects of classes described in a high level data model definition. phpersistence is an object oriented persistence layer for php, using transparent object relational mapping. www.wiki.cc /php/Object_Relational_Mapping   (475 words)

Object vs. relational database management systems I have been asked to write a few words on the benefits of the object database model as compared to the relational database model. Also, you do not need to write any mapping or conversion code that would be needed if you used a different data model in an RDBMS than the one afforded by the object programming language. This tight coupling between object programming languages and ODBMSs is one reason you are starting to see more and more ODBMSs being used in embedded systems, but I digress... whatis.techtarget.com /tip/0,289483,sid13_gci834245,00.html   (872 words)

Is the Relational Model the Best Model? Gadgetopia Relational is really good at what it’s doing this day because everybody as adapted to it, there is thousands of people who have done research around this model, who have tuned the way we are accessing it. For example you are saying that the object model is inferior in terms of data insertion and update because you are thinking you need to adapt it to a table: if you are using a true object database it’s not you’re problem it’s the problem of the database engine. Because, in my experience, the relational model is, without a doubt, the easiest to store data in and query, primarily because SQL has been designed around it. www.gadgetopia.com /post/4293   (2761 words)

Database Models: Hierarcical, Network, Relational, Object-Oriented, Semistructured, Associative and Context. Such databases subsume the modelling power of recent extensions of flat relational databases, to nested databases which allow the nesting (or encapsulation) of entities, and to object databases which, in addition, allow cyclic references between objects. These record types are the equivalent of tables in the relational model, and with the individual records being the equivalent of rows. In contrast to a relational DBMS where a complex data structure must be flattened out to fit into tables or joined together from those tables to form the in-memory structure, object DBMSs have no performance overhead to store or retrieve a web or hierarchy of interrelated objects. unixspace.com /context/databases.html   (2376 words)

Relational Model Spatial applications using the relational model will continue to work; however, if you are not already using the object-relational model for all Spatial applications, you are encouraged to do so before the next release. Oracle Spatial supports two models for representing geometries: relational and object-relational. In the next release of Oracle Spatial, the relational model will no longer be documented in this guide, but will instead be documented in a separate document whose title and location will be announced. www.usd.edu /oracle/doc/inter.817/a85337/sdo_prtr.htm   (148 words)

Object-Relational Mapping Basics & Strategies Finally, the goal of relational modeling is to normalize data (i.e., eliminate redundant data from tables), whereas the goal of object-oriented design is to model a business process by creating real-world objects with data and behavior. Superset mappings are used to create "view classes" that hide the underlying data model, or to map a class inheritance tree to the database using a Vertical mapping approach (see next section). In relational databases a join table is used to maintain a relationship between the rows of two tables (or two different rows in the same table). www.objectmatter.com /vbsf/docs/maptool/ormapping.html   (3891 words)

Hibernate in Action: Practical Object/Relational Mapping Transformations between the Java object model and the persistent relational model are often complex, tedious and costly to implement. Applications built with an ORM tool can be expected to be cheaper, more performant, more portable and more resilient in the face of changes to the internal object or underlying relational models. Object/Relational Mapping (ORM) is the name given to automated solutions to this transformation problem - known as the object/relational impedance mismatch. www.theserverside.com /books/review/HibernateReview.jsp   (688 words)

Object-Relational Mapping - Taking the Horror Out of Data Access We have to map the object-oriented data model to a relational data model, basically mapping objects to tables. Even though we access the data at a higher level by navigating through beautiful objects, the data is still available in a relational form allowing you to plug straight into the db to perform number crunching or data mining. By using object relational mapping you can still access data by connecting directly to the RDBMS, unlike choosing an OODBMS. www.devx.com /vb2themax/Article/19894   (750 words)

object relational mapping for EJB and object persistence It seamlessly bridges the gap between Java object model and SQL relational model by providing a very natural object-oriented interface to store and retrieve Java objects using relational databases. object relational mapping for EJB and object persistence It also allows mapping of existing (legacy) relational data to Java objects. www.softwaretree.com /products/jdx/Jdx1.htm   (757 words)

Lightweight object/relational Mapping An unwritten consensus in the IT industry is that data shared between object-oriented software and relational databases is best exchanged with object/relational (O/R) mapping frameworks where the entity relationship (ER) model follows the object-oriented model. Join digg for free to comment on this story. digg.com /programming/Lightweight_object_relational_Mapping   (62 words)

Training: Object Relational Mapping URL: Object Relational Mapping - From Object Model to Data Model In the training course, you will be introduced to Object Relational Mapping, the capability to map between object-oriented programming objects and relational databases. This mapping not only preserves the data, but also the state, foreign/primary key mapping, difference in data type and business logic. www.javalobby.org /java/forums/t18535.html   (322 words)

Omniseek: /Computing /Data Formats /Database /Relational / an advanced object relational database management system, that allows you to better model your organization's data for today's complex business applications. A Relational Database Management System (RDBMS) is a DBMS which is based on the relational model. Create a Relational Database with the speed and ease of the HTML Language that is *COMPATABLE* with every platform and operating system. www.omniseek.com /srch/{20687}   (322 words)

Date defends relational model That is, with relational DBMSs, every time you want to process an object, you have to assemble it, which is the same as having to take your car apart in order to park it, and then assemble it every time you need to drive it. Having spent decades as a staunch proponent of relational theory, Date tells database professionals that seemingly harmless phrases, such as flat tables, have added to the misconceptions that surround the relational model. Among the barriers to the relational model, Date said, is the Structured Query Language (SQL). searchoracle.techtarget.com /originalContent/0,289142,sid41_gci962949,00.html   (750 words)

A Theory of the relational model of Organizational Intelligence - PRF Brown A separate article entitled Incompleteness of the Relational Model describes in a straightforward manner how the current paradigm can be seen to be incomplete, providing concrete example of its failure to address stored procedure object data within the database systems environment. The Relational Model of the Data needs to be placed into the perspective of this new vantage point, which has essentially evolved technologically out of the RDBMS software that the relational model inspired. The current Relational Model of the Data is very limited in its application outside of its self-proclaimed boundaries of a data centric world-view. www.mountainman.com.au /software/Theory_of_Organizational_Intelligence.htm   (3575 words)

Object-relational mapping - Wikipedia, the free encyclopedia Using relational databases to store object-oriented data leads to a semantic gap where programmers would be required to allow their software to function in two different worlds — processing of data would be done in object-oriented form, but the same data would have to be stored in relational form. Object-Relational mapping (or O/RM), is a programming technique that links databases to object-oriented language concepts, creating (in effect) a "virtual object database." There are both free and commercial packages available that perform object-relational mapping, although some programmers opt to code their own object-relational mapping for their systems. Relational databases (which try to implement the Relational Model), do maintain relationships via constraints but the SQL query language is generally unaware of these. en.wikipedia.org /wiki/Object-relational_mapping   (1804 words)

Object-relational mapping - Wikipedia, the free encyclopedia Using relational databases to store object-oriented data leads to a semantic gap where programmers would be required to allow their software to function in two different worlds — processing of data would be done in object-oriented form, but the same data would have to be stored in relational form. Relational databases (which try to implement the Relational Model), do maintain relationships via constraints but the SQL query language is generally unaware of these. The crux of the problem is in translating those objects to forms which can be stored in files or databases, and which can later be retrieved easily while preserving the properties of the objects and their relationships; these objects can then be said to be persistent. en.wikipedia.org /wiki/Object-relational_mapping   (1811 words)

More mappings: Relational Model - Domain Model - Presentation Model Roughly, the idea is to use more mappings than just object-relational mapping, which is used to map your domain objects to a relational database. This means we would have Relational Model <-> Domain Model <-> Presentation Model. The first new mapping is between your domain objects and the presentation layer. weblogs.asp.net /fmarguerie/archive/2005/01/18/355335.aspx   (249 words)

Technorati Tag: relational model Relational Database Models Study for a computer programming degree from your home or office. Data Analysis Software Object oriented or relational databases designed effortlessly - free trial of enterprise architect v6.1 supports all 13 UML 2.0 diagrams - tutorials, whitepapers and resources available now. Limitations of the Relational Model Categories: Relational technology & vendors — Curt Monash @ 11:22 am In my October Computerworld column, I tried... technorati.com /tag/relational+model   (278 words)

Object-relational database - Wikipedia, the free encyclopedia Another advantage to the object-relational model is that the database can make use of the relationships between data to easily collect related records. An object-relational database (ORD) or object-relational database management system (ORDBMS) is a relational database management system that allows developers to integrate the database with their own custom data types and methods. Object-relational database management systems grew out of research that occurred in the early 1990s. en.wikipedia.org /wiki/Object-relational_database   (625 words)

Foundations of Object-Relational Mapping Object-relational mapping is the process of transforming between object and relational modeling approaches and between the systems that support those approaches. It then covers how to integrate objects into the relational model followed by how to implement that integration with current database systems. Relational theory is concerned with knowledge and object techniques are concerned with (primarily) behavior. www.chimu.com /publications/objectRelational   (348 words)

The Theoretical Foundations of the Relational Model - dBforums \nclaimed the superiority of the relational model because of it\'s strong mathematical \n \'the relational model\' are not really about programming at all. \nthe object folk something of where the relational crowd are coming from. dbforums.com /t406270.html   (6418 words)

Amazon.com: The Database Relational Model: A Retrospective Review and Analysis : A Historical Account and Assessment of E. F. Codd's Contribution to the Field of Database Technology: Books: C. J. Date Databases, Types and the Relational Model (3rd Edition) by C. Foundation for Object / Relational Databases: The Third Manifesto by C. The Database Relational Model: A Retrospective Review and Analysis : A Historical Account and Assessment of E. Codd's Contribution to the Field of Database Technology (Paperback) www.amazon.com /exec/obidos/tg/detail/-/0201612941?v=glance   (1200 words)

X3H7 Object Model Features Matrix The term object model, as used throughout this document, refers to the collection of concepts used to describe objects in a particular object-oriented language, specification, or analysis and design methodology, and corresponds closely to the use of the term data model in "the relational data model". Similarly, exclusion of an object model is not necessarily an indication of an object model's "lack of importance". Thus, inclusion of an object model in the matrix is not necessarily an indication of the object model's "importance"; it may simply incorporate a specific design choice of interest to H7. www.objs.com /x3h7/fmindex.htm   (1200 words)

The Object/Relational Database Takes Shape Combining relational and object database technologies may be the way to deal with new types of data while protecting your investment in the conventional. By combining the speed at which relational databases handle raw stock data housed in tables with the flexibility of treating trades as objects and using intranet objects as a delivery medium, the application achieves its best performance. In an object model, which looks like a tree structure, you have a trade object, which points to the various legs of that trade, each of which in turn points to its cash flow. www.uniforum.org /news/html/publications/ufm/nov96/ordb.html   (2569 words)

Choosing an object-relational mapping tool The principle of object-relational mapping is to delegate to tools the management of persistence, and to work at code-level with objects representing a domain model, and not with data structures in the same format as the relational database (.NET's DataSet class). Object-relational mapping tools often base the development of your applications on the fact that the entities you handle are linked to a data source with which they communicate directly to reflect updates you perform on them. Object-relational mapping tools establish a bidirectional link with data in a relational database and objects in code, based on a configuration and by executing SQL queries (dynamic most of the time) on the database. madgeek.com /Articles/ORMapping/EN/mapping.htm   (2005 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.