The WSDL specification contains the following example of an array of floats:

<complexType name="ArrayOfFloat"> 
  <complexContent> 
    <restriction base="soapenc:Array"> 
      <attribute ref="soapenc:arrayType" wsdl:arrayType="xsd:float[]"/> 
    </restriction> 
  </complexContent> 
</complexType> 

This is invalid as the Schema Primer states that:

    that types derived by restriction must repeat all
    the components of the base type definition that are to be
    included in the derived type

The implication of this is that the above definition describes a
complexType which can never contain child elements. The use of such
definitions causes problems for any software which correctly applies
the rules of xml schemas to such definitions.

In order for it to contain elements, it must either:
	repeat the <xs:any>  from the original SOAP array definition
or
	replace it with a more restrictive definition.

There are a number of different ways to define an array. However, the
example in the spec should be replaced with the following:

<xs:complexType name="ArrayOfFloat"> 
  <xs:complexContent> 
    <xs:restriction base="soapenc:Array"> 
      <xs:sequence> 
        <xs:element name="item" minOccurs="0" maxOccurs="unbounded"
type="xs:float" /> 
      </xs:sequence> 
      <attribute ref="soapenc:arrayType" wsdl:arrayType="xs:float[]"/> 
    </xs:restriction> 
  </xs:complexContent> 
</xs:complexType> 


To make matters worse, such definitions appear in the interop tests for
WSDL.
Propagating such invalid definitions even further.

We need an errata for the WSDL spec so that the use of this invalid array
definition can be prevented.

James.


Cape Clear Software Limited.
61 Fitzwilliam Lane
Dublin 2
Ireland

Email : james.pasley@[...].com
Switchboard  : + 353 (1) 2419900
Direct line  : + 353 (1) 2419957
Fax          : + 353 (1) 2419901
www          : www.capeclear.com

Visit www.capescience.com


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