Detailed explanation of the Language CCSID Mappings feature 

Description:

When a Partition Initialization is performed after updating the Partition Definition using System Initialization, the following dialog is displayed.

This dialog lists the codepages and CCSID that are used for multilingual text conversions. Principally this is used when exporting from iSeries to Windows and when using the Host Monitor, but it is also used when exporting from Windows to another Windows repository.

The purpose of the dialog is to:

1. make you aware that LANSA has to make these decisions and,
2. precisely what decisions LANSA has made in assigning codepages and CCSID to each language.

It is only shown the very first time that a Partition Initialization is performed after obtaining the Partition Definition using System Initialization. If you need to see the information subsequently, it is listed in the Product Information (Installation Details in langmap.txt) accessible from the Visual LANSA Editor.

We can see the same explanation in the following documentation.
Visual LANSA Administrator Guide in 2.3 Partition Initialization