A mapping session is the process of using the mapping editor to create mappings between locations in an XML schema structure and locations in a COBOL or PL/I data structure.
Mappings are stored in a mapping session file. A request mapping session file contains mappings from XML to COBOL or PL/I. A response mapping session file contains mappings from COBOL or PL/I to XML.
The contents of a mapping session file is called mapping metadata and includes the names and locations of the source and target elements and the particulars of each mapping.
To create mapping session files you use the Create Mappings wizard, in which you specify the source and target elements. You then use the mapping editor to create mappings. For each mapping you connect the appropriate locations in the source and target elements.