Problem parsing the WSDL 1.1 Schema

Hi,

I am trying to validate a WSDL sample file against the WSDL 1.1 Schema, but
getting the following error.

 

Error from Libxml (C based XML Parser):

wsdl_schema.xsd:135: element complexType: Schemas parser error : complex
type 'operationType': The content model is not determinist.

 

Error from Altova XMLSpy :

<:element name="input" ... > makes content model non-deterministic against
<:element name="input" ... >.

Possible causes: name equality, overlapping occurrence or substitution
groups.

 

So, is there really a problem with the schema document or some defect with
these parsers. 

Any inputs..???

Thanks in advance.

 

Regards,

Harbhanu

Ps: I have taken the schema from the section A 4.1 from WSDL 1.1.