xsd:redefine recently broken

• Key: XERCESC-1544
• Type: Bug
• Status: Open
• Priority: Major
• Assignee: Unassigned
• Reporter: Jerry Carter
• Component/s: Validating Parser (XML Schema)
• Affects Version/s: 3.1.0

Description

The W3C schema for VoiceXML is quite complex and makes a good test of Xerces. Previous versions worked well, but 2.7.0 has some problems. In addition the regexp issues (bug 1512), xsd:redefine is also broken. This has worked in previous versions (up through 2.6.0, I believe).

The main VXML schema <http://www.w3.org/TR/voicexml21/vxml.xsd> eventually includes <http://www.w3.org/TR/voicexml21/vxml-synthesis-extension.xsd>. There, on line 28 is the problem statement:

<xsd:redefine schemaLocation="vxml-synthesis-restriction.xsd">

This generates two classes of error messages.
1: Message: Could not find a declaration in the schema to be redefined corresponding to '...'
2: Message: Global complexType:'...' declared more than once or also declared as simpleType

--------------------------------------

To reproduce, run the following lines through SAX2Print:

<?xml version="1.0" encoding="UTF-8"?>
<vxml version="2.1" xmlns="http://www.w3.org/2001/vxml"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.w3.org/2001/vxml
  http://www.w3.org/TR/voicexml21/vxml.xsd">

<form>
  <block>
    <exit/>
  </block>
</form>

</vxml>

xerces-c-src_2_7_0/bin: ./SAX2Print -v=always schema_issue.xml

<?xml version="1.0" encoding="LATIN1"?>

Error at file http://www.w3.org/TR/voicexml21/vxml-synthesis-restriction.xsd, line 30, char 53
  Message: Could not find a declaration in the schema to be redefined corresponding to 'say-as'

Error at file http://www.w3.org/TR/voicexml21/vxml-synthesis-restriction.xsd, line 43, char 52
  Message: Could not find a declaration in the schema to be redefined corresponding to 'audio'

Error at file http://www.w3.org/TR/voicexml21/vxml-synthesis-restriction.xsd, line 55, char 38
  Message: Could not find a declaration in the schema to be redefined corresponding to 'mark'

Error at file http://www.w3.org/TR/voicexml21/vxml-synthesis-extension.xsd, line 30, char 53
  Message: Global complexType:'say-as' declared more than once or also declared as simpleType

Error at file http://www.w3.org/TR/voicexml21/vxml-synthesis-extension.xsd, line 43, char 52
  Message: Global complexType:'audio' declared more than once or also declared as simpleType

Error at file http://www.w3.org/TR/voicexml21/vxml-synthesis-extension.xsd, line 55, char 38
  Message: Global complexType:'mark' declared more than once or also declared as simpleType
<vxml version="2.1" xsi:schemaLocation="http://www.w3.org/2001/vxml http://www.w3.org/TR/voicexml21/vxml.xsd">

<form scope="dialog">
  <block>
    <exit></exit>
  </block>
</form>

Comments

[Alberto Massari]

Here is a smaller test case: the error appears when schema A redefines something from schema B that redefines schema C, and then tries to access definitions from schema C

[Boris Kolpackov]

Still present in the 3.1.0 codebase.