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Date: Tue, 12 Jun 2007 07:53:33 -0700 (PDT)
From: "James Strachan (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
Subject: [jira] Resolved: (AMQ-929) Invalid XSD (according to XML Spy)
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     [ https://issues.apache.org/activemq/browse/AMQ-929?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

James Strachan resolved AMQ-929.
--------------------------------

       Resolution: Fixed
    Fix Version/s: 5.0.0

Great thanks for the heads up Bertrand; looks like 5.0.0 should be good from an XSD perspective

> Invalid XSD (according to XML Spy)
> ----------------------------------
>
>                 Key: AMQ-929
>                 URL: https://issues.apache.org/activemq/browse/AMQ-929
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 4.1.0
>         Environment: N/A
>            Reporter: Stephen Cresswell
>            Priority: Minor
>             Fix For: 5.0.0
>
>         Attachments: activemq.xsd
>
>
> XmlSpy reports http://people.apache.org/repository/org.apache.activemq/xsds/activemq-core-4.1-incubator-SNAPSHOT.xsd is invalid with the following message:
> <xs:element ref='tns:topic'> makes the content model non-deterministic. Possible causes: name equality, overlapping occurance or substitution groups.
> It's complaining because it has no way to validate whether it should validate against tns:topic/tns:queue or the xs:any for the following element
> <xs:element name='destination' minOccurs='0' maxOccurs='1'>
>    <xs:complexType>
>       <xs:choice minOccurs='0' maxOccurs='1'>
>          <xs:element ref='tns:queue'/>
>          <xs:element ref='tns:topic'/>
>          <xs:any/>
>       </xs:choice>
>    </xs:complexType>
> </xs:element>
> Possible fix adapted from http://www.thescripts.com/forum/threadedpost1605613.html:
> <xs:element name="destination" minOccurs="0" maxOccurs="1">
> 	<xs:complexType>
> 		<xs:choice minOccurs="0" maxOccurs="1">
> 			<xs:element name="extensions">
> 				<xs:sequence maxOccurs="1">
> 					<xs:any/>				
> 				</xs:sequence>
> 			</xs:element>
> 			<xs:element ref="tns:queue"/>
> 			<xs:element ref="tns:topic"/>
> 		</xs:choice>
> 	</xs:complexType>
> </xs:element>
> But I suspect difficult to fix as the XSD is autogenerated + you'll lose backwards compatability with previous documents. The problem occurs repeatedly throughout the schema.

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