Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Derivation and implementation of an extended entity-relationship data model
Thesis (MSc) -- University of Stellenbosch, 1991.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Stellenbosch : Stellenbosch University
2012
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613916014575617 |
|---|---|
| access_status_str | Open Access |
| author | Greeff, Jeanette |
| author2 | Rennhackkamp, M. H. |
| author_browse | Greeff, Jeanette Rennhackkamp, M. H. |
| author_facet | Rennhackkamp, M. H. Greeff, Jeanette |
| author_sort | Greeff, Jeanette |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MSc) -- University of Stellenbosch, 1991. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/68699 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:43:44.261Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/68699 Derivation and implementation of an extended entity-relationship data model Greeff, Jeanette Rennhackkamp, M. H. Stellenbosch University. Faculty of Science. Dept. of Computer Science. Database management Programming languages (Electronic computers) -- Semantics Relational databases -- Design Relational databases Dissertations -- Computer science Thesis (MSc) -- University of Stellenbosch, 1991. The entity-relationship model, first proposed by Chen in 1976, is generally considered to be one of the first true semantic models to appear in the literature. The model supports the representation of abstract sets of entities, relationships between these entity sets and attributes defined from both entity and relationship sets to data values. It models the way people think. In this research study an efficient representation of the entity-relationship model was devised and implemented. The original definition of the entity-relationship model was augmented with several extensions to provide the basic model with necessary abstraction capabilities. A data definition language was defined for the entity-relationship model that specifies the description of all database objects. A data manipulation language was also defined for the entity-relationship model. It is used to specify operations on data in the database. Vigorous measures were taken to preserve integrity of the data. The extended entity-relationship model was mapped to the relational model according to rigorous transformation rules which generate integrity rules automatically. The data definition and data manipulation language were mapped to equivalent generic relational languages which are supported by any second generation relational database management system in the industry. The implementation provides a powerful and easy to use entity-relationship interface for non-technical users. Masters 2012-08-27T12:26:43Z 2012-08-27T12:26:43Z 1990 Thesis http://hdl.handle.net/10019.1/68699 en Stellenbosch University 213 pages application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Database management Programming languages (Electronic computers) -- Semantics Relational databases -- Design Relational databases Dissertations -- Computer science Greeff, Jeanette Derivation and implementation of an extended entity-relationship data model |
| title | Derivation and implementation of an extended entity-relationship data model |
| title_full | Derivation and implementation of an extended entity-relationship data model |
| title_fullStr | Derivation and implementation of an extended entity-relationship data model |
| title_full_unstemmed | Derivation and implementation of an extended entity-relationship data model |
| title_short | Derivation and implementation of an extended entity-relationship data model |
| title_sort | derivation and implementation of an extended entity relationship data model |
| topic | Database management Programming languages (Electronic computers) -- Semantics Relational databases -- Design Relational databases Dissertations -- Computer science |
| url | http://hdl.handle.net/10019.1/68699 |
| work_keys_str_mv | AT greeffjeanette derivationandimplementationofanextendedentityrelationshipdatamodel |