If blank (the default) the default transfer syntax list specified by the registry keys (default or transfer syntax-specific) is used, but if , this value is non-blank then it over-rides the registry setting. The list is space separated – e.g. “1.2.840.10008.1.2 1.2.40.10008.1.2.1” Any syntaxes immediately preceded by an asterisk are sent in their own separate presentation context.