XML model group elements except for disjunction (or choice) will be mapped without regard to the specified constraint. In other words, the generated code will not perform any validation on whether, for example, XML elements that are part of sequence arrive in the request converter in the order specified by the XML schema's sequence constraint.
During the mapping session, you can map XML elements that are part of the choice group to COBOL items just as described for other XML elements. The mapping editor user interface provides facilities to select a specific choice element.