Hi Folks,
I am creating a DFDL schema for a data format that has a field whose value is a
hyphen when no data is available and when data is available, then the field
contains either an ISO datetime or a 3-letter month name. Here's how I
specified the field:
<xs:element name="MyField" nillable="true" dfdl:nilValue="-">
<xs:complexType>
<xs:choice dfdl:choiceLengthKind="implicit">
<xs:element name="DateTimeIso">
<xs:complexType>
<xs:sequence>
...
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="MonthName" type="xs:string"
dfdl:length="3" dfdl:lengthKind="explicit" />
</xs:choice>
</xs:complexType>
</xs:element>
When I run it, Daffodil gives this error message:
[error] Schema Definition Error: Nillable complex type elements can only have
'%ES;' as their dfdl:nilValue property.
Is that an error in Daffodil? Or, is it an actual DFDL restriction? If the
latter, why is there such a restriction? How do I work around this error?
/Roger
