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Pentaho Data Integration 4 Cookbook

You're reading from   Pentaho Data Integration 4 Cookbook Over 70 recipes to solve ETL problems using Pentaho Kettle

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Product type Paperback
Published in Jun 2011
Publisher Packt
ISBN-13 9781849515245
Length 352 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (17) Chapters Close

Pentaho Data Integration 4 Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Working with Databases FREE CHAPTER 2. Reading and Writing Files 3. Manipulating XML Structures 4. File Management 5. Looking for Data 6. Understanding Data Flows 7. Executing and Reusing Jobs and Transformations 8. Integrating Kettle and the Pentaho Suite 9. Getting the Most Out of Kettle Data Structures Index

Specifying fields by using XPath notation


If you intend to read or write XML structures, it's mandatory that you understand at least the basics of XPath, the language for finding information in an XML document, or defining parts of an XML document. In this recipe, you will be introduced to the XPath notation, so that you will find it easier to work with the rest of the recipes in the chapter.

Suppose you have an XML structure such as the following:

<w_cond>
  <data>
    <request>
      <type>City</type>
      <query>Buenos Aires, Argentina</query>
    </request>
    <current_condition>
      <observation_time>08:12 PM</observation_time>
      <temp scale="C">19</temp>
      <temp scale="F">66</temp>
      <weatherDesc>Sunny</weatherDesc>
      <windspeed unit="Miles">8</windspeed>
      <windspeed unit="Kmph">13</windspeed>
      <dirDegree>70</dirDegree&gt...
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