[Xml-compile] Sequence with minOccurs=0

[Roman Daniel]

Hi Mark,

I tried recently to process a "real" (our) world schema containing sequence
with minOccurs=3D"0",
but the script below failed with: error: required value for element `str'
missing at {http://my.cz}env

Is it a bug or an intention?
By such schema we just wanted to ensure that some elements in sequence
appears either all of them or none.
Is there some cleaner way how to accomplish this?

Roman Daniel


#!/usr/bin/perl
use strict;
use warnings;
use XML::Compile::Schema;
my $schema =3D XML::Compile::Schema->new(<<'END_SCHEMA');
<xs:schema
        xmlns:xs=3D"http://www.w3.org/2001/XMLSchema"
        xmlns:xsi=3D"http://www.w3.org/2001/XMLSchema-instance"
        targetNamespace=3D"http://my.cz"
        elementFormDefault=3D"qualified">
  <xs:element name=3D"env">
    <xs:complexType>
      <xs:sequence>
        <xs:element name=3D"first" type=3D"xs:string" />
        <xs:sequence minOccurs=3D"0">
            <xs:element name=3D"str" type=3D"xs:string" />
            <xs:element name=3D"dt" type=3D"xs:date" />
        </xs:sequence>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>
END_SCHEMA

my $w =3D $schema->compile(WRITER =3D> "{http://my.cz}env");
my $doc =3D XML::LibXML::Document->new;
my $elem =3D $w->($doc, {first =3D> 'F'});
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