The basic request parcels are constructed by CLIv2 on behalf of the application; therefore, they are not normally visible to the application. Request parcels may be constructed by applications that use a DBCAREA Request-mode of B (commonly referred to as Buffer-mode applications) or by applications that use the DBCAREA Initiate-request extension (DBCAIRX). For such applications, see Parcels for Advanced Applications for details of the various Request Parcels.