Add a "value template" step?

[ndw]

I found myself with a long block of inline text in a pipeline:

<p:with-input>
  <p:inline content-type="text/plain">
  lots
  of
  {$text}
  goes
  here
  </p:inline>
</p:with-input>

I decided it would be easier to manage if the text file was external:

<p:with-input href="mytext.txt"/>

But then, of course, none of the value templates in the text are expanded.

Perhaps a value-template step that takes an input and a parameter map and performs value-template expansion on the document would be useful.