Content deleted Content added
→Overview: Correct the statement that data models aren't used for documents. (Look at the Open Office model!) |
m →History: entity relationship models were widely used by practitioners before Chen's formalisation in the academic literature. |
||
Line 43:
In the 1960s data modeling gained more significance with the initiation of the [[management information system]] (MIS) concept. According to Leondes (2002), "during that time, the information system provided the data and information for management purposes. The first generation [[database system]], called [[Integrated Data Store]] (IDS), was designed by [[Charles Bachman]] at General Electric. Two famous database models, the [[network data model]] and the [[hierarchical data model]], were proposed during this period of time".<ref>Cornelius T. Leondes (2002). ''Database and Data Communication Network Systems: Techniques and Applications''. Page 7</ref> Towards the end of the 1960s, [[Edgar F. Codd]] worked out his theories of data arrangement, and proposed the [[relational model]] for database management based on [[first-order logic|first-order predicate logic]].<ref>''"Derivability, Redundancy, and Consistency of Relations Stored in Large Data Banks"'', E.F. Codd, IBM Research Report, 1969</ref>
In the 1970s [[entity relationship model]]ing emerged as a new type of conceptual data modeling, originally
In the 1970s [[G.M. Nijssen]] developed "Natural Language Information Analysis Method" (NIAM) method, and developed this in the 1980s in cooperation with [[Terry Halpin]] into [[Object-Role Modeling]] (ORM). However, it was Terry Halpin's 1989 PhD thesis that created the formal foundation on which Object-Role Modeling is based.
| |||