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Topic: Database model

	Database - Wikipedia, the free encyclopedia
		For instance, one database model is to associate each fact with a record representing an entity (such as a person), and to arrange these entities into trees or hierarchies -- the hierarchical database model.
		The flat (or table) model consists of a single, two-dimensional array of data elements, where all members of a given column are assumed to be similar values, and all members of a row are assumed to be related to one another.
		The dimensional model is often implemented on top of the relational model using a star schema, consisting of one table containing the facts and surrounding tables containing the dimensions.
	en.wikipedia.org /wiki/Database (2273 words)

	Enterprise Architect - the UML CASE tool for software design and construction
		Database columns are modelled as attributes of the «Table» class.
		In the physical model, a component may be mapped on to a physical piece of hardware (a 'node' in UML).
		In the object model, non-persistent objects at run-time are typically identified by direct reference or by a pointer to the object.
	www.sparxsystems.com.au /uml_topics/uml_datamodel/uml_datamodel.htm (4608 words)

	California PestCast: Disease Model Database--UC IPM (Site not responding. Last check: 2007-11-04)
		This database is a part of a project called "PestCast," a regional weather network to support the development, validation, and implementation of crop disease models.
		To ensure widespread applicability, these descriptive models must be validated across a variety of microclimates over a number of years by researchers and extension personnel cooperating with pest control advisors and growers.
		To reproduce model results, it is important to place the sensors in the same location as they were in the research and validation work.
	www.ipm.ucdavis.edu /DISEASE/DATABASE/diseasemodeldatabase.html (1544 words)

	Database Models: Hierarcical, Network, Relational, Object-Oriented, Semistructured, Associative and Context. (Site not responding. Last check: 2007-11-04)
		In semistructured data model, the information that is normally associated with a schema is contained within the data, which is sometimes called ``self-describing''.
		In such database there is no clear separation between the data and the schema, and the degree to which it is structured depends on the application.
		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.
	www.unixspace.com /context/databases.html (2376 words)

	JWS Online Cellular Systems Modelling: Model Database (Site not responding. Last check: 2007-11-04)
		A kinetic model of the branch-point between the methionine...
		Modelling the dynamics of the yeast pheromone pathway - model
		Quantitative assessment of the glyoxalase pathway in Leishmania infantum - model
	jjj.biochem.sun.ac.za /database (356 words)

	UCMP Data Model
		The UCMP data model has undergone rapid evolution in the last few years, and now provides a road map to the types of information that we maintain in dealing with our collections.
		The data model is a complex one, because it integrates information from all of the museum's divisions: Invertebrates, Vertebrates, Prokaryotes & Protists and Paleobotany, and tracks information from recent and fossil collections, museum archives and literature references.
		The notation in the data model diagrams shows whether or not an attribute is required (C indicates that a value may not be required) and whether one or many relationships are permitted.
	www.ucmp.berkeley.edu /museum/datamodel/datamodel.html (466 words)

	Edgar F. Codd, father of &quorelational database model&quo left us...
		Using mathematical logic heavily, he worked on a relational model where all information would be represented by values in rows and columns in tables and no longer pointers and connections between records up to the infinite.
		A political consequence of that data model and its sublanguage is that it granted nonprogrammers the holding of an asset that they never had before - namely an environment where information and data can live separately from programming codes and being shared across the boundaries of institutions.
		The trouble as i see it now is that with the proliferation of that relational data model in banks, in governments, in educational institutions etc. etc, social interactions are cutting off all its edges so they can be fit into relational data model.
	www.advogato.org /article/666.html (1675 words)

	Which database model fits? (Site not responding. Last check: 2007-11-04)
		This paper is concerned with the kinds of effects a given database model has on the features and functionality of a database application.
		Network model pointers can be used to quickly navigate from a "parent" record to its "child" record(s), but when a large number of child records exist, an index can be used to quickly locate a randomly selected record.
		The proven efficiency of the network model mandates its use when millions of records must be on-line, unless users are willing to accept the slower performance of a relational model database.
	www.pds-site.com /WhitePapers/wp_wdbfits.htm (5048 words)

	Database Models (Site not responding. Last check: 2007-11-04)
		The theory behind the relational database model is discussed the section entitled 'Characteristics of a Relational Database'; this section focuses on the distinctions between the relational model and other database models
		If you are using a non-relational database, you probably have to modify the application that will access this information by including 'pointers' to the new data.
		With a relational database, the information is immediately accessible because it is automatically related to the other data by virtue of its position in the table.
	www.frick-cpa.com /ss7/Theory_Models.asp (2781 words)

	Dilip's Brief Introduction to Relational Databases (Site not responding. Last check: 2007-11-04)
		It is useful to build a high level conceptual data model where we depict the entities that we are dealing with, their various attributes, and their relationships.
		It is relatively straighforward to represent a database design in graphical ER Diagrams, where rectangles represent entity types, diamonds relationship types, and ovals attributes.
		The relational model of databases provides a very simple way of looking at data structured into tables, and there are straightforward techniques, such as ER modeling (though we didn't map the ER to the relational model) to represent a world view from which to build a relational database.
	www.cs.unc.edu /Courses/wwwp-s98/members/barman/databaseLesson (2870 words)

	Open Source Native XML Database (Site not responding. Last check: 2007-11-04)
		The database implements the current XQuery 1.0 working draft as of November, 2003 (for the core syntax, some details already following later versions), with the exception of the XML schema related features.
		XQuery files can be directly passed to the database, using either the XQueryServlet, the XQueryGenerator for Cocoon or the REST-style API (see Developer's Guide).
		The database is lightweight, completely written in Java and may be easily deployed in a number of ways, running either as a stand-alone server process, inside a servlet-engine or directly embedded into an application.
	exist.sourceforge.net (600 words)

	Technology review: Databases
		A small company maintaining its own database is probably not a big risk at the basic technical level provided it can demonstrate the capabilities for creating the right data structures reliably and flexibly.
		Free Form databases have no structure and thus the advantages of a relational structure to create authority files where data is kept just once and concepts such as global edit and heading merge are not easy to achieve.
		The database management functions are closely coupled with the application language and as a result Mumps is a very fast and efficient database management environment.
	www.biblio-tech.com /html/databases.html (2454 words)

	DbDesigner homepage
		It allows you to construct your DB in an intuitive and easy to use environment, where you have a visual representation of the tables and relations contained in your project.
		After you are finished, DbDesigner can export the schema of the database into an.sql script, or directly connect to a database backend and build it there.
		On the other hand, if you are building complex databases you might have already seen products like this one.
	dbdesigner.sourceforge.net (479 words)

	Model Kit Databases
		I have set up two versions of an Access database for members of IPMS and HPMS (the Huntsville Plastic Modelers, of which my husband is a member). They are FREE for your use, but you must have Microsoft Access 2000 or '97 installed on your computer to use them.
		Note that the 97 version is very similar but has no 'main menu'; see documentation (available at left of screen) for pointers.
		I will work on creating a database that does not require Access, time permitting. If you know of such a program, and it is freeware or shareware, please email me and I will add a link to it from this page. Thank you!
	www.geocities.com /hpmsdbase (318 words)

	Department Awards $34.6 Million Contract to Develop and Operate World's Largest Education Database
		The ERIC database will use the latest search and retrieval methods to cull education literature and give high-quality access to educators, researchers, and the general public.
		The database will include as much free full text as possible, and links will be provided to commercial sources so that individuals can purchase journal articles and other full text immediately.
		During the development and transition to the new ERIC, the ERIC database will continue to be available at http://www.eric.ed.gov, and materials selected in 2003 will continue to be added.
	www.ed.gov /news/pressreleases/2004/03/03182004.html (507 words)

	Alternatives to the relational database model
		A problem with the relational database as OO programming technology advances is that developers must understand both the relational database language (SQL) as well as the OO programming language (Java, for example) that is to be used to design the application.
		For an OO database, a select OO programming language is used to define the structure of the database as well as create an application through which to interact with the database.
		Although some rough seams exist between the object-oriented and relational models, the object-relational model was developed with the objective of combining the concepts of the relational database model with object-oriented programming style.
	searchsecurity.techtarget.com /tip/1,289483,sid13_gci556020,00.html (2240 words)

	NMITA: Proposed Database Model
		Our full database model was developed by Budd, Golden, and Fortunato (see NMITA Staff) using ERwin 2.1 through consultation with Brenda Ulin (Senior Systems Analyst, Institutional Data and Data Management (IDDM), Information Technology Services, Univ. Iowa).
		It is patterned after the Information Model for Biological Collections of the Association of Systematic Collections (ASC) - March 1993 version, and conforms with the Invertebrate Paleontology Collections (IPC) Model developed at the NSF Collections Computerization Workshop following NAPC-6 in June 1996.
		During the first stage of the project (through January 2001), dynamic searches are being developed using several smaller databases whose structure is based on denormalized versions of the full database model.
	porites.geology.uiowa.edu /nmtdbmdl.htm (231 words)

	Motorcycle Online: New Model Database Search (Site not responding. Last check: 2007-11-04)
		Here, you can search our database of 1995, 1996, 1997 and 2000 motorcycles.
		For instance, if you want to see the new model information for bikes costing less than $7000 with seat heights under 32 inches, set the "to" field for price (7000) and seat height (32).
		Model and/or Year (or leave blank, default year is 1995):
	www.motorcycle.com /mo/mcdbase/mcdbase.html (166 words)

	Object Role Modeling (Site not responding. Last check: 2007-11-04)
		Northface University has begun work on a new modeling tool suite to implement the next generation of ORM (ORM 2), with the initial implementation planned to be a free plug-in to Microsoft's.NET framework, building on Microsoft's Meta Data Framework.
		Models developed in VisioModeler may be exported to Microsoft's current and future ORM solutions, which are based on the Visio drawing engine.
		Object Role Modeling (ORM) is a powerful method for designing and querying database models at the conceptual level, where the application is described in terms easily understood by non-technical users.
	www.orm.net (2247 words)

	Microsoft Access Programmers & Consulting Database Developers
		Our programmers' goal is to program fast, user-friendly databases at a good price with unparalleled customer support.
		Our databases hold more data, run faster and are more reliable than nearly all databases existing today.
		Key to Access database function is the design of the tables and relationships.
	www.BlueClaw-DB.com (604 words)

	ZFIN The Zebrafish Database Project
		ZFIN serves as the zebrafish model organism database.
		Monte Westerfield, P.I.; Judy Sprague, database director; and the rest of the ZFIN Database Team.
		This paper describes the data model and structure of the database.
	zfin.org /zf_info/dbase/db.html (433 words)

	Chracteristics of a Relational Database (Site not responding. Last check: 2007-11-04)
		The relational database model is based firmly in the mathematical theory of relational algebra and calculus
		EXAMPLE: The code in an application that accesses data in a file-based database typically depends on the file format (e.g., the code references a 'phone number' field that is 10 characters wide, is preceded by the 'zip code' field, followed by the 'fax number' field...).
		There cannot be other paths into the database that subvert data integrity; in other words, you can't get in the 'back door' and change the data in such a manner as data integrity is violated
	www.frick-cpa.com /ss7/Theory_RelationalDB.asp (1666 words)

	Could not obtain exclusive lock on database Model. Retry the operation Later (Site not responding. Last check: 2007-11-04)
		Hi, I would appreciate if someone could tell me what is wrong in trying to creat e a database within MSDE (e.g "Create database dbname").
		Is there any chance the "current database" is model, rather than master when you are issuing the command?
		Our default database is set to "master" and th e problem still happens.
	www.mcse.ms /message478759.html (916 words)

	Visio Reverse Engineer dBASE Database Model (Site not responding. Last check: 2007-11-04)
		So if you are able to dig up how you achieved the connection I will very much appreciate it.
		HI Gerald, First create a dsn ointing to the dbase tables The in visio create a new databse model by: On the File menu, point to New, point to Database, and then click Database Model Diagram.
		On the Database menu, point to Reverse Engeneer, and then click Reverse Engeneer.
	droptable.com /Programming_with_dBASE/m4133-Visio_Reverse_Engineer_dBASE_Database_Model... (846 words)

	Companies - Specializing - Database Model Software
		Specializes in: modeling, diagram, studio, relationship, charonware s r o, data, case, database, design, software, entity, tool, development, er diagram, case studio 2
		Specializes in: data model, jscript, foldertree, posc, tree, javascript, posc caesar, step, html, tool, utility, consulting, bean, services, access, essence associates ltd, information, menu, folder tree, process, database, essence, software, dhtml, standards, visual basic
		Specializes in: fabforce, syncronisation, modeller, oracle, rational rose, dbdesigner 4, dbdesigner4, visual database design, mysql, erwin, free database designer, dataarchitect, kompany, reverse engineering
	www.soft411.org /companies/database-model.html (330 words)

	The Relational Database Model - Part 1 (Site not responding. Last check: 2007-11-04)
		A relational database is commonly understood to be a collection of files which are linked together in some way.
		The relational data base is a particular database model or a particular kind of database that is based on the structures and mathematics of relations.
		The term relation is a mathematical term which means a two-dimensional table which is not homogeneous in its rows, ie, the number of rows (unlike the number of columns) is not fixed.
	www.guides.sk /reldb_dsgn/rdbd_rd1.htm (984 words)

	HistoryLink Essay: Boeing's Model 314 Clipper Flying Boat -- A Snapshot History
		The most elegant and successful of these was Boeing's Model 314, which first flew in 1938 and operated through World War II.
		On June 22, 1938, 15 days after the 314 flew, Boeing and PAA publicly announced the follow-on model 326 giant flying boat airliner.
		None of the model 326, nor any of four competing designs in the 1937 PAA contest for a flying ocean liner capable of crossing the Atlantic non-stop with 100 passengers flying in pressurized comfort above the weather, was built.
	www.historylink.org /output.CFM?file_ID=3253 (1635 words)

	ISAT Users Group
		The ISAT Database Users Group was formed to help users learn more about the database model, share experience with other users, and present ideas for improvements.
		In addition to solutions that are scalable, supporting work for individuals, work groups, and the entire enterprise, pipeline companies need access to their information from the office, the field, or anywhere the user may be.
		You’ll also have the opportunity to take part in an ongoing exchange of ideas about the database model and its many applications.
	www.isatmodel.org (293 words)

	PA-GOSUB: a searchable database of model organism protein sequences with their predicted Gene Ontology molecular ...
		PA-GOSUB: a searchable database of model organism protein sequences with their predicted Gene Ontology molecular function and subcellular localization -- Lu et al.
		PA-GOSUB: a searchable database of model organism protein sequences with their predicted Gene Ontology molecular function and subcellular localization
		database effectively expands the coverage of subcellular localization
	nar.oupjournals.org /cgi/content/abstract/33/suppl_1/D147 (320 words)

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