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
Environment: N/A
Reporter: Stephen Cresswell
Priority: Minor
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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