Unparsing unordered sequences behaviour

[Peter Kostouros]

Hi

I hope someone can clarify the behaviour I am seeing with respect to unparsing 
unordered sequences whose elements in the info set (to be unparsed) are a 
subset of those defined in the schema.

Basically the case I have is an element that contains an unordered sequence of 
subelements, where each subelement is optional. Parsing such an example results 
in a successful transformation, however, unparsing that output results in error.

A snapshot of the tmdl xsd is shown below

<element name="seq2">
  <complexType>
    <sequence dfdl:sequenceKind="unordered">
      <element name="x" type="xsd:string" dfdl:initiator="X:" 
dfdl:terminator="%NL;" />
      <element name="y" type="xsd:string" dfdl:initiator="Y:" 
dfdl:terminator="%NL;" />
    </sequence>
  </complexType>
</element>

Unparsing something like the following results in error

<seq2>
  <y>y0</y>
</seq2>

I have attached a test case (modified from 
daffodil-test-ibm1/src/test/resources/test-suite/tresys-contributed/) that 
demonstrates this, see Test Case BE004-A.

In the system I am working with the error is of the form

"Expected element start event for {pug}D03_Record, but received element end 
event for {}D_Records."

for a definition like the following, where the info set being unparsed contains 
XML entries for D01_Record and D02_Record elements:

<!-- DETAILS -->
<xs:element dfdl:lengthKind="implicit" name="D_Records" minOccurs="0">
  <xs:complexType>
    <xs:sequence dfdl:sequenceKind="unordered">
      <xs:element ref="D01_Record" />
      <xs:element ref="D02_Record" />
      <xs:element ref="D03_Record" />
      <xs:element ref="D04_Record" />
      <xs:element ref="D05_Record" />
      <xs:element ref="D06_Record" />
      <xs:element ref="D07_Record" />
      <xs:element ref="D08_Record" />
      <xs:element ref="D09_Record" />
      <xs:element ref="D10_Record" />
    </xs:sequence>
  </xs:complexType>
</xs:element>

I am aware that unordered sequences may be a work in progress.

I am working with daffodil retrieved a few days ago from github, --version 
displays

Apache Daffodil (incubating) 2.5.0


Peter

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BE.dfdl.xsd
Description: BE.dfdl.xsd

BE.tdml
Description: BE.tdml