XPaths and Yang

Introduction

I created this page to document and share our findings on using XPath expressions with Yang.

External Resources

https://stackoverflow.com/questions/51639936/what-is-the-xpath-to-access-leaves-within-a-list-yang

https://www.w3schools.com/xml/xpath_syntax.asp

XPath Syntax

In this example I have used XML just to demonstrate how XPaths work.

<bookstore>
  <categories>
    <name>web</name>
    <books>
      <authors>Toine Siebelink</authors>
      <authors>David Lang</authors>
      <lang>en</lang>
      <price>123456</price>
      <pub_year>2020</pub_year>
      <title>My first book</title>
    </books>
  </categories>
  
  <categories>
    <name>art</name>
    <books>
      <authors>Test</authors>
      <lang>en</lang>
      <price>1234</price>
      <pub_year>2020</pub_year>
      <title>My 2nd book</title>
    </books>
  </categories>
</bookstore>

Path Expression	Result

Path Expression	Result
/bookstore/categories[name='web']	<categories> <name>web</name> <books> <authors>Toine Siebelink</authors> <authors>David Lang</authors> <lang>en</lang> <price>123456</price> <pub_year>2020</pub_year> <title>My first book</title> </books> </categories>
/bookstore/categories[name='web']/books/title	<title>My first book</title>