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Subject: [NEW ISSUE] Problems with the Extension Points in the XSD for binding.ws
- From: Mike Edwards <mike_edwards@uk.ibm.com>
- To: "OASIS Bindings" <sca-bindings@lists.oasis-open.org>
- Date: Wed, 14 Apr 2010 11:37:25 +0100
Target:
sca-wsbinding-1.1-spec-cd03-rev3.doc
Description:
The SCA XSDs mix two different forms
of extensibility and this causes significant problems such as UPA errors.
The two forms of extensibility are:
1) The use of substitution groups for
the extensibility of:
implementation
interface
binding
wireFormat
operationSelector
importBase
exportBase
2) The use of
<any namespace="##other"
processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
for extensibility in many locations
A UPA problem potentially exists in
any place where ONE or MORE of the elements in the list 1) above is declared
to be used within another element in
combination with 2) in a sequence or choice where it may occur that one
of the
list 1) elements is validly succeeded
by an <any/> of the form in 2). IF an extended version of any of
the 1) elements
is created, in a non-sca namespace (this
is REQUIRED for any non-standard extension), then a UPA error will be
reported whenever such an extension
is used.
This occurs in the XSD sca-binding-ws-1.1-cd04.xsd
<complexType
name="WebServiceBinding">
<complexContent>
<extension
base="sca:Binding">
<sequence>
<element
name="endpointReference"
type="wsa:EndpointReferenceType"
minOccurs="0"
maxOccurs="unbounded"/>
<any
namespace="##other"
processContents="lax"
minOccurs="0"
maxOccurs="unbounded"/>
</sequence>
<attribute
name="wsdlElement"
type="anyURI"
use="optional"/>
<attribute
ref="wsdli:wsdlLocation"
use="optional"/>
</extension>
</complexContent>
</complexType>
The sca:Binding base contains both wireFormat
and operationSelector elements - these then clash with the <any/>
extensibility
Proposal:
Replace the <any/> extensibility
with extensibility using the sca:extensions element as follows:
<complexType
name="WebServiceBinding">
<complexContent>
<extension
base="sca:Binding">
<sequence>
<element
name="endpointReference"
type="wsa:EndpointReferenceType"
minOccurs="0"
maxOccurs="unbounded"/>
<element
ref="sca:extensions" minOccurs="0" maxOccurs="1"
/>
</sequence>
<attribute
name="wsdlElement"
type="anyURI"
use="optional"/>
<attribute
ref="wsdli:wsdlLocation"
use="optional"/>
</extension>
</complexContent>
</complexType>
Yours, Mike.
Strategist - Emerging Technologies, SCA & SDO.
Co Chair OASIS SCA Assembly TC.
IBM Hursley Park, Mail Point 146, Winchester, SO21 2JN, Great Britain.
Phone & FAX: +44-1962-818014 Mobile: +44-7802-467431
Email: mike_edwards@uk.ibm.com
Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number
741598.
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6
3AU
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