Web Service Description Language, Nirvana Edition

Keith Ballinger

Microsoft

Datatypes are schema

Schema is the type language

<Types> 
  <xsd:schema targetNamespace="http://tempuri.org/"
	xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <xsd:element name="foo"
	  type="xsd:string" />
  </xsd:schema>
</Types>

It's all about the PortType

An PortType is a collection of operations

An operation is defined thusly:

<PortType name="String">  
  <Operation>
    <Input>
      <Body type="QName" />
      <Header type="QName" mandatory="Boolean" />
    </Input>
    <Output>
      <Body type="QName" />
      <Header type="QName" mandatory="Boolean" />
    </Output>
    <Fault />??
  </Operation>
</PortType>

The port is everything else

Port = PortType + Policy Assertions + LogicalName

<Port
      type="QName"
      name="anyURI">
  <PolicyAssertiontype="anyURI" />
  <PolicyAssertiontype="anyURI" />
</Port>

Policy Assertions

The sum of policy assertions = a binding
Example: SOAP/HTTP + Sessions + Auditing
List of URIs, complementary
These URIs refer to aspects that defined elsewhere.
Can also be queried for at runtime
- Runtime query not defined by WSDL

Recommendations

WSDL 1.2 first
- May date reasonable
Nirvana second
- Never done by May

Appendix

Schema Example

Schema Example

<Description
     targetNamespace="http://keithba.com"
     xmlns="http://schemas.xmlsoap.org/ws/2002/04/wsdl/nirvana"
     xmlns:tns="http://keithba.com">
  <Types> 
    <xsd:schema
		targetNamespace="http://keithba.com"
		xmlns:xsd="http://www.w3.org/2001/XMLSchema">
      <xsd:element
		   name="FooRequest"
		   type="xsd:string" />
      <xsd:element
	   name="FooResponse"
	   type="xsd:int" />
    </xsd:schema>
  </Types>

Example (cont.)

Example (cont.)

<Port type="tns:FooPortType" name="http://keithba.com/MyPort">
    <PolicyAssertion
         type="http://schemas.xmlsoap.org/soap/http" />
    <PolicyAssertiontype="http://schemas.xmlsoap.org/ws/2002/01/secext"/>
  </Port>
</Description>