Fixed field advanced demo. HTML5 disabled. A fixed FORM field can only contain the fixed value or, under some circumstances, be empty. If a field is bound to an XML attribute its value cannot be the empty string, if is bound to an element can. In any case in the output the value is always present, whatever XML node is chosen. Required [element], Single Occurrence, with Simple Type [inline-Form-FixedVersion] localName is [FixedVersion] without namespace Required [element], Single Occurrence, with Simple Type [inline-Form-FixedVersionMustFill] localName is [FixedVersionMustFill] without namespace Optional [element], Single Occurrence, with Simple Type [inline-Form-FixedVersionOptional] localName is [FixedVersionOptional] without namespace Required [attribute], Single Occurrence, with Simple Type [inline-Form-FixedVersionAttribute] localName is [FixedVersionAttribute] without namespace Optional [attribute], Single Occurrence, with Simple Type [inline-Form-FixedVersionAttributeOptional] localName is [FixedVersionAttributeOptional] without namespace Optional [attribute], Single Occurrence, with Simple Type [inline-Form-FixedVersionAttributeOptionaEmptyIsNulll] localName is [FixedVersionAttributeOptionaEmptyIsNulll] without namespace Fixed field advanced demo. HTML5 disabled. A fixed FORM field can only contain the fixed value or, under some circumstances, be empty. If a field is bound to an XML attribute its value cannot be the empty string, if is bound to an element can. In any case in the output the value is always present, whatever XML node is chosen.