Implemented in the Data Manager for DB2 and DB2 for z/OS only.
For string domains it specifies an expansion factor (float from 1.0 to 4.0) to be applied when multibyte character set (MBCS) data will be used with DB2 or DB2 for z/OS. It overrides the global build-time property (curam.db.multibyte.expansion.default.factor) and is only necessary in order to deviate from the global setting (e.g. a particular domain is causing a DB2 limit to be exceeded). A setting of 1.0 effectively turns off expansion for this domain. You might choose to set this option for domains where you know the contents will never contain localized data; e.g. they are constrained to programmatically-defined Western characters and can't be input via a client. The same option set for a string entity attribute can override this domain setting (see Multibyte Expansion Factor for more information). This option is ignored if the feature is turned off (curam.db.multibyte.expansion set to false at build time; see the Cúram Server Developer's Guide for more information).