Specifies that a metadata field option list has blank value as the first option in the list.
Returns TRUE if the first value in the option is blank.
Returns FALSE if the first value in the option list is not blank.
Specifies that the first value in the option list is blank:
<$if ForceDocTypeChoice and isTrue(ForceDocTypeChoice)$> <$addEmptyOption = 1$> <$endif$>