Non-deterministic content model

When I validated a simple XML document [1] with a simple 
schema [2], XSV gave me the following error message[3]:

""non-deterministic content model for type 
None: {http://big.w3.org/dtd2xsd/test.xml}:B/
{http://big.w3.org/dtd2xsd/test.xml}:B"

[1] http://big.w3.org/dtd2xsd/test2.xml
[2] http://big.w3.org/dtd2xsd/test.xml
[3] http://www.w3.org/2000/06/webdata/xsv?docAddrs=http%3A%2F%2Fbig.w3.org%2Fdtd2xsd%2Ftest2.xml&style=text

It seems that the following definition is wrong.
However, I don't know why it is wrong.
Can anyone tell me why?

 <element name='A'>
  <complexType content='elementOnly'>
   <element ref='test:B' minOccurs='0' maxOccurs='unbounded'/>
   <element ref='test:C' minOccurs='0'/>
   <element ref='test:B' minOccurs='0' maxOccurs='unbounded'/>
  </complexType>
 </element>

-- 
Yuichi Koike (koike@ay.jp.nec.com)
NEC Corporation
World Wide Web Consortium (W3C)
Technology and Society Domain
http://www.w3.org/People/Koike/

Received on Wednesday, 23 August 2000 18:50:07 UTC