title: Swift Application header standard format for Input and output messages
body: <p>I tried to search the <strong>Swift</strong> application header i.e <code>block 2</code> standard formats for input and output messages on swift official site i.e <a href="https://www.swift.com/" rel="nofollow noreferrer">https://www.swift.com/</a> but I am unable to get this details. </p>
  
  <p>Can anyone please help me to get an official link where format specification for swift <code>block 2</code> is present? This is required to write a parsing logic for my code.</p>
  
  <p>Thank you!</p>