A Normal Form Object-Oriented Entity Relationship Diagram

Simple item page
dc.contributor.authorLing T Wen_US
dc.contributor.authorTeo Pit Koonen_US
dc.date.accessioned2004-10-21T14:28:52Zen_US
dc.date.accessioned2017-01-23T07:00:48Z
dc.date.available2004-10-21T14:28:52Zen_US
dc.date.available2017-01-23T07:00:48Z
dc.date.issued1994-06-01T00:00:00Zen_US
dc.description.abstractA normal form object-oriented entity relationship (OOER) diagram is presented to address a set of OO data modelling issues. These issues include the inability to judge the quality of an OO schema, the presence of inheritance conflicts in ISA hierarchies, the lack of explicit support for different relationship types (m-n, n-ary, recursive etc.) in some OO data models and the lack of general and flexible support for views. Three approaches are described to translate good quality OO schemas from a normal form OOER diagram. The first approach translates OO schemas whose underlying OO data models support the notion of relationship. There are no undesirable redundancies in the translated schemas. The second approach provides for OO data models that do not support the notion of relationship. Some redundancies may arise because of m-n, n-ary relationships, but these can be controlled. The third approach treats each OO schema as an external schema of a conceptual schema represented by a normal form OOER diagram. Redundancies may exist at the external schema level, but no redundancies exist at the conceptual schema level.en_US
dc.format.extent184781 bytesen_US
dc.format.extent59419 bytesen_US
dc.format.mimetypeapplication/pdfen_US
dc.format.mimetypeapplication/postscripten_US
dc.identifier.urihttps://dl.comp.nus.edu.sg/xmlui/handle/1900.100/1368en_US
dc.language.isoenen_US
dc.relation.ispartofseriesTRD6/94en_US
dc.titleA Normal Form Object-Oriented Entity Relationship Diagramen_US
dc.typeTechnical Reporten_US
Files
Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
report.ps
Size:
58.03 KB
Format:
Postscript Files
Description:
Download
Thumbnail Image
Name:
report.pdf
Size:
180.45 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.52 KB
Format:
Plain Text
Description:
Download
Collections
Technical Reports