Unofficial Developer’s Guide to HL7v3 Basics

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Who is this book for? I wrote this book primarily for software developers, software testers, interface analyst, system integrators and others who for a better understanding of the standard need more organized guide to the HL7v3 standard documentation. I realize that I will probably be criticized from both sides. Software Developers may criticize this book that it does not cover some specific implementation details well, or for lacking of source codes and XML schema/MIF based codes generation techniques. Interface Analysts may complain that this book skips some steps in gathering requirements to identify storyboards and hence the types of interaction necessary to meet real world scenarios. I tried to include as much details as possible but let's face it, in a book of this size it is difficult to cover all HL7v3 standard features, as well as tons of additional information that very talented guys described in their blogs or discussed on forums. After all, this book is not a substitute to the standard by itself or official training materials provided by HL7 and affiliates. Also, there are topics not well covered in HL7 standards and even topics where HL7 is absolutely silent as to how certain things may be implemented or verified. Instead, I tried to organize the HL7 standard learning process showing what topics I would recommend you - as a developer, who has just started and wants to learn HL7v3 basics as quickly as possible - read first, read next, and what topics can be skipped at the moment. Assumption This book assumes that you are dealing with applications that use message-oriented middleware products and I expect that you have at least a minimal understanding of Web service technologies including, but not limited to, XML, XML Schemas, XPath, XSL Transformation and Schematron. Before you start reading this book, you should have a basic knowledge of Open Systems Interconnection (OSI) model, Unified Modeling Language (UML), Enterprise Integration Patterns (EIP) and Java programming language. You should also have some basic knowledge of HL7, the standard that is being used to exchange healthcare data, both version 2 and version 3. Introduction 6
Who should not read this book? As mentioned earlier, the purpose of this book is to provide the reader with a high -level overview of the capabilities and features associated with HL7v3. This book is not intended to be a step-by-step comprehensive guide or substitute of any kind to original training and certification programs provided by Health Level Seven International, its affiliates and numerous local providers. This book is also not a complete tutorial on a specific domain messaging or middleware technology implementation. All examples, scenarios, scripts and source codes included in this book are for illustrative purposes only. If you are interested in learning more about a specific technology or product, please refer to Health Level Seven International website as a primary source of knowledge. This book does not cover any specific system architecture, programming language, development frameworks or tools to build a domain specific HL7v3 based healthcare system. However, it provides references to some of them which you may explore further. Errata and Book Support I have made every effort to ensure the accuracy of this book and its companion content. If you find errors or have comments or suggestions, please report through email – hl7@isarp.com Your feedback is highly appreciated! Warning and Disclaimer The purpose of this book is to educate and entertain. Every effort has been made to make this book as complete and as accurate as possible, but no warranty or fitness is implied. The information is provided on an “as is” basis. The author shall have neither liability nor responsibility to any person or entity with respect to any loss or damage caused, or alleged to be caused, directly or indirectly by the information contained in this book or from the use of software mentioned in this book. The information, methods and techniques described by the author are based on his own experience. They may not work for you and no recommendation is made to follow the same course of action. No representation is made that following the advice in this book will work in your case. 7 Introduction
Page 1 and 2: Shamil Nizamov Unofficial Developer
Page 3 and 4: Contents PART 1 HL7V3 COMMUNICATION
Page 5: Introduction Introduction HL7 stand
Page 9 and 10: Part 2 focuses on the implementatio
Page 11 and 12: CHAPTER 1 Systems Integration Requi
Page 13 and 14: FIGURE 1-2 System architecture with
Page 15 and 16: • If the Application asked for a
Page 17 and 18: Transactional Reliability Transacti
Page 19 and 20: Summary Before I continue here is a
Page 21 and 22: CHAPTER 2 HL7 Implementation Guides
Page 23 and 24: ../MessageSpecs ../Samples ../schem

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