Properties of optional Field

The <optional> field has all the common properties as well as ones listed below. Refer to <optional> Field chapter for detailed description.

Property Name	Allowed type / value	DSL Version	Required	Default Value	Description
field	field	1	no		Wrapped field.
defaultMode	"tentative", "missing", "exist"	1	no	tentative	Default mode of the field. See also Default Mode Strings below.
cond	string	1	no		Condition when the field exists.
displayExtModeCtrl	bool	1	no	false	Disable manual update of the mode in GUI analysis tools.

Inner field must be specified using field property or as child XML element.

Extra child XML elements allowed:

XML Element	DSL Version	Description
<field>	1	Wraps member field.
<cond>	1	Condition when field exists.
<and>	1	Logical "and" of conditions.
<or>	1	Logical "or" of conditions.

Default Mode Strings

Mode	Accepted Values (case insensitive)
Tentative	"tentative", "tent", "t"
Missing	"missing", "miss", "m"
Exist	"exist", "exists", "e"