[jira] [Created] (DAFFODIL-1910) Cannot unparse when array with minOccurs="0" is last in a sequence

["Steve Lawrence (JIRA)" <ji...@apache.org>]

Steve Lawrence created DAFFODIL-1910:
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             Summary: Cannot unparse when array with minOccurs="0" is last in a sequence
                 Key: DAFFODIL-1910
                 URL: https://issues.apache.org/jira/browse/DAFFODIL-1910
             Project: Daffodil
          Issue Type: Bug
          Components: Front End
            Reporter: Steve Lawrence
            Assignee: Steve Lawrence
             Fix For: 2.2.0


We have a schema like this:
{code:java}
<xs:sequence>
  <xs:sequence>
    <xs:sequence>
      <xs:element name="foo" ... />
    </xs:sequence>
    <xs:element ref="bar" minOccurs="0" maxOccurs="unbounded" dfdl:occursCountKind="implicit" /> 
  </xs:sequence>
  <xs:element name="baz" ... />
</xs:sequence>
{code}
During schema compilation, we determine which elements could potentially appear in the infoset after the "foo" element. We correctly determine that "bar" could come after "foo", but we fail to recognize that "baz" could also come after "foo", since "bar" has minOccurs="0". This means that when unparsing, if "bar" does not exist, Daffodil outputs an error saying it expected only "bar" but did not find it.

 



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