title: Can a global expression be created in Azure Data Factory?
body: <p>I have certain expressions used by multiple steps in <code>Azure Data Factory</code>.
  For instance, I get the start time of a pipeline often:</p>
  <pre><code>@formatDateTime(pipeline().TriggerTime, 'yyyy-MM-dd HH:mm:ss.fff')
  </code></pre>
  <p>If I need to change it for some reason, I'd need to update it everywhere.</p>
  <p>I know about <a href="https://docs.microsoft.com/en-us/azure/data-factory/author-global-parameters" rel="nofollow noreferrer">global parameters</a>; however, is there a way to create global expressions?</p>