Mapping Between Views

This chapter establishes the relationship between corresponding elements and structures that appear in different views in Volume II. Not all pairwise view combinations have a mapping in this section, and not every element is mapped. The emphasis is on mappings that provide useful insights.

The following table summarizes the mappings in this chapter. The table cells tell which section contains a mapping between the corresponding views on the cell's row and column header.

	Module Decomposition	Module Generalization	Module Uses	Module Layered	C&C Pipe-and-Filter	C&C Shared-Data	C&C Communicating-Processes	Allocation Deployment	Allocation Implementation	Allocation Work Assignment
Module Decomposition		4.1	4.4			4.2	4.3		4.4	4.4
Module Generalization	4.1
Module Uses	4.4								4.4	4.4
Module Layered
C&C Pipe-and-Filter
C&C Shared-Data	4.2
C&C Communicating-Processes	4.3
Allocation Deployment
Allocation Implementation	4.4		4.4							4.4
Allocation Work Assignment	4.4		4.4						4.4

4.1 Mapping Between Module Decomposition View and Module Generalization View

Generalization View Element	Decomposition View Element	Relation
IngestData class	Ingest subsystem	The subsystem contains the named classes and all their child classes. The interface of the Ingest subsystem is provided completely by the union of the interfaces of all the named classes and their children.
DataTypeL0Data
DataTypeNMCData
DataTypeAlgorithm

4.2 Mapping Between Module Decomposition View and C&C Shared-Data View

Shared-Data View Element	Decomposition View Element	Relation
DictServ	Data Management subsystem	The named shared-data elements are part of the given subsystem.
V0GW
AsterGW
MTool
RPC	Communications and Systems Management Segment
InstallData
[etc.]	[etc.]	[etc.]

4.3 Mapping Between Module Decomposition View and C&C Communicating-Processes View

Communicating-Processes View Element	Decomposition View Element	Relation
EcInAuto	Ingest subsystem	The named processes are part of the given subsystem.
EcInPolling
EcInGUI
EcInReqMgr
EcInEmailGWServer
EcInGran
Sybase Server
RPC
Notification
SQL
[etc.]	[etc.]	[etc.]

4.4 Mapping Between Module Decomposition View, Module Uses View, Allocation Implementation View, and Allocation Work Assignment View

The segments and subsystems named in the two allocation views and the module uses view are exactly the same elements as those named in the module decomposition view.

[Other mappings omitted.][5]

[5] It not necessary or desirable to include mappings between every pair of views. A minimum goal is to establish at least one strong module/C&C mapping and a mapping from allocation views to the views whose elements they allocate.