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Topic: CODASYL


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In the News (Wed 11 Nov 09)

  
  CODASYL - Wikipedia, the free encyclopedia
CODASYL (often spelt Codasyl) is an acronym for "Conference on Data Systems Languages".
The records of CODASYL were donated to the Charles Babbage Institute and may be found at their website.
Interest in CODASYL generally faded due to growing interest in relational databases beginning in the early 1980's.
en.wikipedia.org /wiki/CODASYL   (455 words)

  
 THECOMDAILY: Information Technology Management - Database Management System
The Codasyl approach was based on the "manual" navigation of a linked dataset which was formed into a large network.
IMS was generally similar in concept to Codasyl, but used a strict hierarchy for its model of data navigation instead of Codasyl's network model.
He was unhappy with the navigational model of the Codasyl approach, notably the lack of a "search" facility which was becoming increasingly useful when the database was stored on disk instead of tape.
www.thecomdaily.com /itm/dbms.html   (2340 words)

  
 CODASYL
Non-English Usage: "CODASYL" is also a word in the following language with the English translation in parentheses.
"CODASYL" is generally used as a noun (singular) -- approximately 100.00% of the time.
"CODASYL" is used about 8 times out of a sample of 100 million words spoken or written in English.
www.websters-online-dictionary.org /Co/Codasyl.html   (410 words)

  
 Database management system   (Site not responding. Last check: 2007-09-17)
The Codasyl approach was based on the navigation of a linked dataset which was into a large network.
IMS was generally similar in concept Codasyl but used a strict hierarchy for model of data navigation instead of Codasyl's model.
He was unhappy with the model of the Codasyl approach notably the of a "search" facility which was becoming useful when the database was stored on instead of tape.
www.freeglossary.com /Database_management_system   (2518 words)

  
 [No title]
Using the CODASYL COBOL Committee Journal of Development from 1993, I composed the following to illustrate what might be appropriate.
CODASYL requested that a specific acknowledgement be placed in the preface to any such publication." Others may be able to come up with something better.
CODASYL requested that an acknowledgement be placed in the preface to any such publication." I found a document on the JTC1 web site stating that a Bibliography should not be labeled "Annex …".
www.ncits.org /tc_home/j4htm/m225/00-0387.doc   (422 words)

  
 The History of Databases [EN] - Faethon.NET   (Site not responding. Last check: 2007-09-17)
CODASYL is most famous for the creation of the COBOL programming language, but many people don’t know that CODASYL is also responsible for the creation of the first modern database.
During the same period CODASYL was creating the Network Data Model, another effort was under way to create the first hierarchical database.
Both the Network Data Model from CODASYL and IMS from IBM were major steps forward because they marked the paradigm shift of separating data from application code, and they laid the framework for what a database should look like.
www.faethon.net /forums/showthread.php?t=73   (1488 words)

  
 RE: [xml-dev] XML Data Modellling/Linking (was RE: [xml-dev] AfterXQuery, are we done?)
The two things that are nowadays often confused are that the Codasyl model (a) had a network data model, and (b) had a procedural (navigational) DML.
In fact, at least on the retrieval side, several Codasyl database systems added declarative query languages, and they were considerably easier to use than SQL because you could follow relationships without spelling out all the join conditions.
He was an IBMer, and most of the action on Codasyl databases was outside the IBM sphere.) With XPath and XQuery we currently have a read-only declarative language over a hierarchic model.
www.oxygenxml.com /archives/xml-dev/200410/msg00328.html   (441 words)

  
 TDAN Gorman - SQL Standard
Starting in 1978, the H2 committee was chartered to create a standard for the CODASYL (Committee on Data Systems and Languages) Network data model.
The NDL standard was based on the CODASYL DDLC’s (Data Definition Language Committee) work that was started in the early 1970s.
The DDLC’s effort was a offshoot of the database languages task group of the Codasyl Cobol Committee.
www.tdan.com /i016hy01.htm   (2996 words)

  
 Wikinfo | Database management system   (Site not responding. Last check: 2007-09-17)
As computers grew in capability this tradeoff became increasingly unnessesary, and a number of general-purpose database systems emerged, and by the mid-1960s there were a number of such systems in commercial use.
Instead of records being stored in some sort of linked list of free-form records as in Codasyl, his concept was to use a "table" of fixed-length records.
By this time it had become clear that Codd's ideas were both workableand superior to Codasyl, and IBM started working on a true product versions of System R, known as SQL/DS, and, later, Database 2 (DB2).
www.wikinfo.org /wiki.php?title=Database_management_system   (2495 words)

  
 Computer Knowledge - CODASYL
CODASYL met for the first time 28 May 1959.
CODASYL formed a List Processing Task Force in 1965 and this became the Data Base Task Group.
Some of the CODASYL committees continue as spin-offs but the basic organization no longer exists.
www.cknow.com /ckinfo/c/CODASYL-ConferenceonDataS.html   (127 words)

  
 Future of COBOL (as seen in 1979)   (Site not responding. Last check: 2007-09-17)
The CODASYL COBOL Committee has recently approved proposals to remove the CORRESPONDING option and to remove abbreviated combined relation conditions.
If anyone feels strongly enough to put in a lot of individual effort in proposal rewriting, there could be intrinsic functions in COBOL within a couple of years (in time to make the 1986[?] standard).
The CODASYL COBOL Committee and ANSI X3J4 both seem to be working.
users.aol.com /PottmyerJ/cobolfut.htm   (3766 words)

  
 Network model - Wikipedia, the free encyclopedia
The network model is a database model conceived as a flexible way of representing objects and their relationships.
Its original inventor was Charles Bachman, and it was developed into a standard specification published in 1969 by the CODASYL Consortium.
Where the hierarchical model structures data as a tree of records, with each record having one parent record and many children, the network model allows each record to have multiple parent and child records, forming a lattice structure.
en.wikipedia.org /wiki/Network_model   (364 words)

  
 CNN - 1959: The creation of Cobol - June 8, 1999
With Hopper, Bemer served as an adviser to Codasyl.
The next month, the DOD called the first meeting of Codasyl, which consisted of eight computer manufacturers and a few large users.
The DOD broke Codasyl into several committees, and by June, the nine-member "short-range committee" was asked to undertake a six-month investigation into developing the language.
www.cnn.com /TECH/computing/9906/09/1959.idg   (805 words)

  
 COBOL, the Common Business Oriented Language   (Site not responding. Last check: 2007-09-17)
CODASYL is a group made up of representatives from user groups, academia, and computer manufacturers.
COBOL", is one of the foremost experts on COBOL and offers many seminars on the subject of this computing language.
Due to all revisions made by different manufacturers since its first formation by CODASYL, it was decided to create a standard if this language was to survive.
www.wellesley.edu /CS/courses/CS110/History/Cobol.html   (173 words)

  
 SCI - DBMS Database Administration Course for Oracle CODASYL DBMS
In this course, participants will gain a thorough conceptual understanding of the Oracle CODASYL database architecture.
Students attending this course should have completed VMS Utilities and Commands, or be experienced with the commands and utilities available in VMS.
This course is intended for persons responsible for creating, administering, or overseeing an Oracle CODASYL DBMS database, specifically, Database Administrators, Programmers, Database Managers, System Administrators, Network Administrators and Technical Support Professionals.
www.sciinc.com /remotedba/training/dbmsadministration.asp   (254 words)

  
 codasyl - ResearchIndex document query   (Site not responding. Last check: 2007-09-17)
Such interfaces were popularized by the CODASYL proposals of the 1970's and are enjoying a
IMS data model and its most well-known successor, CODASYL, were based on graphbased data structures.
Of Objects and Databases: A Decade of Turmoil - Carey, DeWitt (1996)
citeseer.ist.psu.edu /cis?q=CODASYL   (596 words)

  
 Calligraphy and Computer Standards
The last CODASYL COBOL Committee (CCC) meeting was held in La Jolla California in January 1992.
Born in 1959, the CODASYL COBOL Committee ceased to exist on 17 January 1992.
Bruce Miller, DEC, was one of the quiet respected voices on the CODASYL COBOL committee (CCC).
www.jeromegarfunkel.com /authored/calligraphy.htm   (1837 words)

  
 CODASYL - Webopedia.com   (Site not responding. Last check: 2007-09-17)
Its mission was to develop computer programming languages.
The organization is no longer extant, but the term CODASYL is still used sometimes to refer to COBOL.
This is Oracle Corporation's product information page for CODASYL DBMS Release 7.0.
systems.webopedia.com /TERM/C/CODASYL.html   (76 words)

  
 Oracle DBMS Press Releases
A high-performance database that performs reliably year after year, Oracle CODASYL DBMS is typically found in business critical applications in the insurance industry and in large-scale manufacturing industries such as semiconductors and discrete manufacturing.
Oracle CODASYL DBMS was formerly known as DEC DBMS, and was acquired by Oracle as a part of the Rdb product family.
By enabling Oracle CODASYL DBMS users to run old and new versions of DBMS side by side on the same processor, DBMS V6.1's multiversioning offers two main benefits.
www.jcc.com /OracleDBMSPressReleases.htm   (868 words)

  
 codasyl model - Re: XQuery and Hypertext (was Re: SGML on the Web
Mike Champion scripsit: > The key differentiator was that CODASYL ultimately > relied on "pointers" (which I'm pretty sure are functionally much like > hyperlinks, at least by analogy) to relate bits of information that did > not fit into a hierarchy, Actually, the CODASYL model was about multi-hierarchies, with none preferred.
Here's how you'd do the CODASYL model on a relational DBMS, which is historically backward, but a lot more people understand RDBMSes.
Data is kept in objects like relational tables, except that the primary key is always a generated unique ID. (Implementationally, this was an address.) Then there would be linkage tables, potentially one per pair of tables, with the fields , , .
www.stylusstudio.com /xmldev/200210/post30620.html   (326 words)

  
 Codasyl DBMS Driver - CONNX (ODBC Codasyl, ODBC Codasyl DBMS, DBMS odbc, Codasyl DBMS ODBC, VMS, OpenVMS)
This translates into easy access to all Oracle Codasyl DBMS data through standard SQL, otherwise impossible without custom development.
The software provides additional table- and field-level security to otherwise unprotected Oracle Codasyl DBMS data and also supports Remote Procedure Calls, allowing remote execution of batch jobs, procedures, and applications.
CONNX Codasyl DBMS provides a single point of access to DBMS tables on separate physical OpenVMS Servers, and performs seamless joins between the DBMS tables, using ODBC, OLE DB, or JDBC.
www.connx.com /products/dbms.html   (268 words)

  
 ComputerBase - Lexikon: CODASYL
Mai 1959, von Computerbesitzern bei Regierung, Militär und Privatwirtschaft, sowie Computerherstellern und anderen Interessierten, mit dem Zweck, über die Entwicklung einer gemeinsamen Programmiersprache zu beraten, die in kompatibler Weise auf Computern der verschiedenen Hersteller funktionieren sollte.
Das erste Produkt von CODASYL ist die Programmiersprache COBOL, ein weiteres die Entwicklung von standardisieren Verfahren zur Definition (Data Definition Language) und Bearbeitung (Data Manipulation Language) von Netzwerk-Datenbanksystemen, die in dieser Form als CODASYL-Datenbanken bekannt sind.
Einige Ausschüsse von CODASYL arbeiten noch, aber CODASYL als solches existiert heute nicht mehr; die archivierten Dokumente wurden dem Charles Babbage Institut für Computergeschichte an der University of Minnesota, USA übergeben.
www.computerbase.de /lexikon/CODASYL   (195 words)

  
 database management Resources & Information - database management services
In this paper database management in organizing he described a new system for storing and working with large databases.
A linked-list system would be very inefficient when storing "sparse" databases where some of the data for any one record could database management definition be left empty.
Codd's ideas were establishing database management system themselves as both workable and superior to Codasyl, pushing IBM to develop a true production version of System R, known as SQL/DS, property management database and, later, Database 2 (DB2).
www.bizhisto.com /Biz-Services-Con---Da/database-management.html   (2529 words)

  
 COBOL History
The Conference on Data System Languages (CODASYL) led by Joe Wegstein of National Bureau of Standards (now National Institute of Standards and Technology) developed a new language, and created the first standardized business computer programming language.
The initial specifications for COBOL were presented in a report of the executive committee of CODASYL committee in April of 1960.
It was designed to be a business problem oriented, machine independent and capable of continuous change and development.
www.legacyj.com /cobol/cobol_history.html   (346 words)

  
 SCI - Database Programming Course for Oracle CODASYL DBMS
Write an Oracle CODASYL DBMS DML (Data Manipulation Language) application program in the high level language of their choice
Students attending this course should be familiar with general VMS utilities and commands and should have a good working knowledge of a programming language (preferably COBOL) in the VMS environment.
This course is intended for persons responsible for programming an Oracle CODASYL DBMS Database, specifically, Database Designers/Developers, Database Administrators and Application Programmers.
www.sciinc.com /remotedba/training/dbmsprogramming.asp   (191 words)

  
 SIGMOD Conference 1985: 354-361
The CODASYL database (db) statements in an application program can have one or more different semantics associated with it, depending on the path through which the execution reaches that statement.
The previous works on the conversion of db programs from the CODASYL record at a time interface to the set at a time interface of the relational model consider only a limited class of programs where each db statement in the program is assumed to have a unique semantic interpretation.
In this paper, we first define a framework for analyzing the multiple semantics of the CODASYL operations and their context dependencies.
www.informatik.uni-trier.de /~ley/db/conf/sigmod/DemoK85.html   (584 words)

  
 TDAN Michael Gorman - Great News
From the late 1960s through the late 1980s, there was an attempt to standardize DBMSs that conformed to the network data model through the organization called CODASYL (Committee on Data Systems and Languages).
The documents produced by the CODASYL DDLC (data definition language committee) were called Journals of Development.
Clearly, it is not the relational data model, CODASYL network, hierarchical, or independent logical file data models.
www.tdan.com /i008hy02.htm   (2088 words)

  
 VLDB 1979: 119-128
We propose as an extension to the CODASYL Data Description Language a new external schema facility more powerful than that presently offered by CODASYL subschemas.
Frank Manola: On Relating the CODASYL Database Languages and the ANSI/SPARC Framework.
Diane C. Smith: Conversion and the CODASYL Framework.
www.informatik.uni-trier.de /~ley/db/conf/vldb/Clemons79.html   (476 words)

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