title: Blueprism: how to use the replace function in a calculation stage?
body: <p>I am reading a text from an application using BluePrism. The text has the following structure (the number varies from case to case): "Please take note of your order reference: 525". I need to be able to extract the number from the text. Looking at the calculation stage, there is a replace function: replace(text, pattern, new-text). I want to use this function to replace all alphabetic characters in my text with an empty string to return only whatever is numeric. How can I input that in the pattern? 
  So I want something like this: </p>
  
  <pre><code>Replace([Order confirmation text ], /^[A-z]+$/, " ")
  </code></pre>
  
  <p>Also, I tried to look for a proper documentation for the VBOs that are shipped with blueprism, but couldn't find any. Does anyone know where we can get documentations for blueprism functions? </p>