The following table lists and describes the design items, together with their related definitions and commands.

Table 4-1 Design items and their related definitions and commands

Design item	Description	Related definition and command#
Linkage pattern	Design the pattern of data linkage.	Source system definition: Extraction definition Target system definition: Import definition
Correspondence between source and target databases	Design the correspondence between the source and target databases subject to data linkage, such as mapping keys, data types, and character code set. If the target table contains no data, the data must be created using a program such as the HiRDB database load utility or HiRDB Dataextractor.	N/A
Correspondence between source and target systems	Design the correspondence between the source and target systems, such as the proportions and the data linkage identifiers required to establish correspondence.	Source system definitions: Extraction system definition Extraction environment definition Transmission environment definition Extraction definition Target system definitions: Import system definition Import environment definition
Data linkage system mode	Design the data linkage system as either a unidirectional or bidirectional update system and its application to the hierarchical system.	Source system definitions: Extraction system definition Extraction environment definition Transmission environment definition Extraction definition Target system definitions: Import system definition Import environment definition
Source Datareplicator#	Design the correspondences among files, the extraction/transmission method, the startup and termination methods, and so on for the source Datareplicator.	Source system definitions: Extraction system definition Extraction environment definition Transmission environment definition Commands: - hdestart - hdestop - hdeevent
Target Datareplicator#	Design the correspondences among files, the import method, the startup and termination methods, and so on for the target Datareplicator.	Target system definitions: Import system definition Import environment definition Commands: - hdsstart - hdsstop - hdsrfctl

#: If the source or target system is a mainframe system (XDM/SD E2, XDM/RD E2, ADM, PDM2 E2, or TMS-4V/SP), define the information in XDM/DS. For details about the XDM/DS definitions and commands, see the manual VOS3 XDM Data Linkage Facility XDM/DS Description and Definition and the manual VOS3 XDM Data Linkage Facility XDM/DS Operation. If the source system is a mainframe database that uses SAM files (PDM2 E2 or RDB1 E2), see the applicable product's manual.