Table of contents

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1.1 Notational Conventions

2 Predefined Message Exchange Patterns

2.1 Fault Propagation Rules

2.1.1 Fault Replaces Message

2.1.2 Message Triggers Fault

2.1.3 No Faults

2.2 Message Exchange Patterns

2.2.1 In-Only

2.2.2 Robust In-Only

2.2.3 In-Out

2.2.4 In-Optional-Out

2.2.5 Out-Only

2.2.6 Robust Out-Only

2.2.7 Out-In

2.2.8 Out-Optional-In

3 Predefined Features

3.1 Application Data Feature

3.1.2 Operation

3.1.3 AD/data Property

3.1.4 Description

3.1.5 The ad:mustUnderstand Attribute

3.2 Application Data Module

3.2.1 Features Implemented

3.2.2 Operation

3.3 Application data serialization as HTTP headers

3.3.2 Features Implemented

3.3.3 Operation

4.1 Normative References

4.2 Informative References

Appendices

A Acknowledgements

B.1 Changes

1 Introduction

Introduction

Web Services Description Language provides a number of opportunities to extend the syntax and component model, as mandated by the needs of an application. This document defines and describes a number of these extensions, particularly message exchange patterns and features.

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