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Re: Redefining model group definitions (XSV crash)

From: Kasimier Buchcik <K.Buchcik@4commerce.de>
Date: Thu, 15 Sep 2005 17:22:42 +0200
To: Kasimier Buchcik <K.Buchcik@4commerce.de>
Cc: XML-SCHEMA <xmlschema-dev@w3.org>
Message-Id: <1126797762.1272.24.camel@librax>

Hi,

Added result for IBM's schema quality checker (see below).

On Wed, 2005-09-14 at 14:28 +0200, Kasimier Buchcik wrote:
> Hi,
> 
> XSV 2.10 crashes in the following scenario:
> 
> redef-group.xsd
> ---------------
> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
> 	targetNamespace="urn:test:foo"
> 	xmlns:f="urn:test:foo">
> 
> 	<xsd:redefine schemaLocation="redef-group.inc.xsd">
> 		<xsd:group name="thisGroup">
> 			<xsd:sequence>
> 				<xsd:group ref="f:otherGroup"/>
> 			</xsd:sequence>
> 		</xsd:group>
> 	</xsd:redefine>	
> 
> 	<xsd:group name="otherGroup">
> 		<xsd:sequence>
> 			<xsd:group ref="f:thisGroup"/>
> 		</xsd:sequence>
> 	</xsd:group>
> 
> 	<xsd:element name="foo">
> 		<xsd:complexType>
> 			<xsd:group ref="f:thisGroup"/>
> 		</xsd:complexType>
> 	</xsd:element>
> 
> </xsd:schema>
> 
> redef-group.inc.xsd
> -------------------
> <xsd:schema
> 	xmlns:xsd="http://www.w3.org/2001/XMLSchema"
> 	targetNamespace="urn:test:foo">
> 
> 	<xsd:group name="thisGroup">
> 		<xsd:sequence>
> 			<xsd:element name="bar" type="xsd:string"/>
> 		</xsd:sequence>
> 	</xsd:group>
> 
> </xsd:schema>
> 
> redef-group.xml
> ---------------
> <foo xmlns="urn:test:foo"
> 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> 	xsi:schemaLocation="urn:test:foo redef-group.xsd"/>
> 
> XSV reports:
> 
> <xsv xmlns="http://www.w3.org/2000/05/xsv" crash="true"
>      docElt="{urn:test:foo}foo" instanceAssessed="true"
> instanceErrors="0"
>      rootType="[Anonymous]" schemaErrors="0"
>      schemaLocs="urn:test:foo -> redef-group.xsd"
>      target="file:///p:/libxml2-lab/tests/2005-09-14/redef-group.xml"
>      validation="strict" version="XSV 2.10-1 of 2005/04/22 13:10:49">
> ...
> <bug>validator crash during validation</bug>
> 
> while Xerces-J 2.7.1 reports:
> 
> redef-group.xsd:16,34: (Error) mg-props-correct.2: Circular definitions
> detected for group 'f:thisGroup'. Recursively following the {term}
> values of the particles leads to a particle whose {term} is the group
> itself.
> redef-group.xsd:7,31: (Error) cos-particle-restrict.a: Derived particle
> is empty, and base is not emptiable.
> redef-group.xsd:7,31: (Error) src-redefine.6.2.2: Group 'thisGroup' does
> not properly restrict the group it redefines; constraint violated:
> 'cos-particle-restrict.a'.

SQC reports:

Running custom validation engine SQC...
Initializing Schema Quality Checker. Please wait ...
SchemaQualityChecker has been initialized
PROCESSING p:\libxml2-lab\tests\2005-09-14\redef-group.xsd time :
2005-09-15T17:20:24 ...
p:\libxml2-lab\tests\2005-09-14\redef-group.xsd (file 1 of 1) now being
read ...
java.lang.StackOverflowError
Exception in thread "main" 

Regards,

Kasimier
Received on Thursday, 15 September 2005 15:22:51 GMT

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