|4.6 Interface DNAV-ER|
Data navigation diagrams as the result of DNAV method are created by adding qualified and quantified access paths to the E/R diagrams. Therefore, DNAV requires stable E/R models. By adding (planned) qualified and quantified access paths to the E/R diagrams the (planned) accesses to data in the database (based on the E/R diagrams) of the corresponding database system are defined.
|/Martin, 1987/||Chap. 12 contains examples for the generation of data navigation diagrams.|
|GDPA Online Last Updated 01.Jan.2002 Updated by Webmaster Last Revised 01.Jan.2002 Revised by Webmaster|