Publish output format

The publish format is the updated TTML file contents with the mime type application/ttml+xml:

<?xml version="1.0" encoding="UTF-8"?>
<tt:tt xmlns:tt="http://www.w3.org/ns/ttml" xmlns:ttp="http://www.w3.org/ns/ttml#parameter"
       xmlns="http://www.w3.org/ns/ttml" xmlns:tts="http://www.w3.org/ns/ttml#styling"
       xmlns:ttm="http://www.w3.org/ns/ttml#metadata" ttp:profile="http://www.w3.org/ns/ttml/profile/imsc1/text"
       ttp:frameRate="30">
  <head>
    <layout>
      <region xml:id="av:bottom" tts:extent="100% 100%" tts:padding="5% 5%" tts:displayAlign="after" />
    </layout>
  </head>
  <body>
    <div>
      <p xml:id="1" region="av:bottom" begin="00:00:01:00" end="00:00:03:00">test</p>
    </div>
  </body>
</tt:tt>

When a file is exported using a HTTP call we set the following query parameters in the outgoing request:

Query parameter	Description
`fileId`	The id of the file. The id of the file is set in the Launch Template.