Nope, if the child elements do not consume the full length of the parent
complex type, any left over bytes are just skipped on parsing--the
values of those bytes are ignored. On unparsing, those bytes will be
filled with the dfdl:fillByte property.
On 5/18/22 9:29 AM, Roger L Costello wrote:
Thanks Steve. So if I specify these properties
dfdl:lengthKind="explicit"
dfdl:length="9"
dfdl:lengthUnits="characters"
on an element with complexType, does that implicitly mean "If the element's
value has a length of less than 9, then the value must be left-justified and must be
padded on the right with spaces? That seems to be how Daffodil is behaving.
/Roger
-----Original Message-----
From: Steve Lawrence <slawre...@apache.org>
Sent: Wednesday, May 18, 2022 9:16 AM
To: users@daffodil.apache.org
Subject: [EXT] Re: Why does Daffodil ignore my specification of
textStringJustification and textStringPadCharacter?
Padding/justification only applies to simple xs:string types. They do
not apply to complex types. An alternative would be to model the extra
spaces as a terminator of your MilitaryDayTime element, e.g.
<xs:element name="MilitaryDayTime"
dfdl:lengthKind="implicit"
dfdl:terminator="%SP;%SP;">
On 5/18/22 8:49 AM, Roger L Costello wrote:
Hi Folks,
My input contains slash-separated fields of fixed length. Here's an example
input:
/05180801Z/
That represents:
Month = 05
Day = 18
Hour = 08
Minute = 01
Time zone = Z
The field may contain a choice of either a MonthDayTime element or a
MilitaryDayTime element. The above example shows a MonthDayTime value. Here is
a MilitaryDayTime value:
/211300Z /
That represents:
Day = 21
Hour = 13
Minute = 00
Time zone = Z
Notice the space following the time zone. The space is important because the
field is exactly 9 characters long. The value doesn't take up the 9 characters,
so it is padded with a space.
In my DFDL schema I specified these DFDL properties:
dfdl:lengthKind="explicit"
dfdl:length="9"
dfdl:lengthUnits="characters"
dfdl:textStringJustification="left"
dfdl:textStringPadCharacter="%SP;"
When I run the DFDL schema Daffodil generates two warning messages:
[warn] Schema Definition Warning: DFDL property was ignored:
textStringPadCharacter="%SP;"
[warn] Schema Definition Warning: DFDL property was ignored:
textStringJustification="left"
Below is the relevant portion of my DFDL schema. Why am I getting these
warnings?
<xs:element name="TimeOfReturnToOperations" minOccurs="0"
dfdl:lengthKind="explicit"
dfdl:length="9"
dfdl:lengthUnits="characters"
dfdl:textStringJustification="left"
dfdl:textStringPadCharacter="%SP;">
<xs:complexType>
<xs:choice dfdl:choiceLengthKind="implicit">
<xs:element name="MonthDayTime">
<xs:complexType>
<xs:sequence dfdl:separator="">
<xs:element name="Month" type="non-zero-length-string"
dfdl:lengthPattern="01|02|03|04|05|06|07|08|09|10|11|12"/>
<xs:element name="Day" type="non-zero-length-string"
dfdl:lengthPattern="[0-9]{2}"/>
<xs:element name="Hour" type="non-zero-length-string"
dfdl:lengthPattern="[0-9]{2}"/>
<xs:element name="Minute" type="non-zero-length-string"
dfdl:lengthPattern="[0-9]{2}"/>
<xs:element name="TimeZone" type="non-zero-length-string"
dfdl:lengthPattern="Z"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="MilitaryDayTime">
<xs:complexType>
<xs:sequence dfdl:separator="">
<xs:element name="Day" type="non-zero-length-string"
dfdl:lengthPattern="[0-9]{2}"/>
<xs:element name="Hour" type="non-zero-length-string"
dfdl:lengthPattern="[0-9]{2}"/>
<xs:element name="Minute" type="non-zero-length-string"
dfdl:lengthPattern="[0-9]{2}"/>
<xs:element name="TimeZone" type="non-zero-length-string"
dfdl:lengthPattern="Z"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:complexType>
</xs:element>
