Linkages

CSE Subsetting Task Tables › Subset Task Definitions for the Design Subset Type › Technical Design › Data Structure › Linkages

Linkages

The following table describes using linkages of a data structure:

Step	Description	P	E	Objects	Considerations
1	Add a linkage.	M M	D D	Both implemented entity types Plus associated data table	An entity type scoped with Modify or Delete protection includes its associated data table with Read protection.
2.	Delete a linkage.	M D	D D	Related entity types Plus related data tables	An entity type scoped with Modify or Delete protection includes its associated data table with Read protection. These scoping objects allow the deletion of the linkage only from the Data Structure Diagram. To delete the relationship from the Data Model, use the Data Model rules for the current task.

Step

Description

Objects

Considerations

Add a linkage.

Both
implemented entity types
Plus associated data table

An entity type scoped with Modify or Delete protection includes its associated data table with Read protection.

Delete a linkage.

Related entity types

Plus related data tables

An entity type scoped with Modify or Delete protection includes its associated data table with Read protection.

These scoping objects allow the deletion of the linkage only from the Data Structure Diagram. To delete the relationship from the Data Model, use the Data Model rules for the current task.