title: Specifying the string-value 'yes' in a YAML property
body: <p>Consider the following document:</p>
  
  <pre><code>foo:
    bar: Yes
  </code></pre>
  
  <p>According to <a href="http://yaml.org/type/bool.html" rel="noreferrer">the spec</a>, this should be interpreted as a <code>Boolean</code>, not as a <code>String</code>.</p>
  
  <p>However, <a href="https://github.com/Azure/vscode-kubernetes-tools/issues/405#issuecomment-444706860" rel="noreferrer">it seems</a> that this document yields the same interpretation:</p>
  
  <pre><code>foo:
    bar: 'Yes'
  </code></pre>
  
  <p>If I misunderstand, and <code>'Yes'</code> (in quotes) should in fact be understood as a <code>String</code>-typed value, where in the specs can I find justification for this?</p>
  
  <p>However, if I do interpret correctly, and these documents are equivalent according to spec, how can I specify a string with the value <code>"Yes"</code> as the value of a YAML property?</p>