Flattening a PDF using Assembler's Invoke DDX

Question

I have an XDP that needs to be converted to a flat PDF without using output(The solution can only use forms services).
Since its being called from within the process orchestration by using the invoke DDX service, I'm totally lost as to how its done.
1. How do we select the input from within the properties tab without using the literal value ?
2. How do we set the required "<NoForms/> and "<NoXFA/>" parameters from within the workbench without using a literal value for the input parameter in properties ?
3. Would the invoke DDX service allow output to a OutputResult variable ?
Thanks,
Holy

Answer 1

I was able to do this successfully. The issue that I am facing now that while merging 4 forms together.. if the 2nd or 3rd form happens to be in Landscape orientation, all rest of the forms also convert to the Landscape orientation. Also, when I try printing it, the Printer says the Printer Size did not match Paper type or something of that sort. Following was my DDX:
<DDX xmlns="http://ns.adobe.com/DDX/1.0/">
  <XDP result="MyXDPResult">
    <XDP source="sourceXDP1"/>
    <XDP source="sourceXDP2"/>
    <XDP source="sourceXDP3"/>
    <XDP source="sourceXDP4"/>
  </XDP>
  <?ddx-source-hint name="sourceXDP1"?>
  <?ddx-source-hint name="sourceXDP2"?>
  <?ddx-source-hint name="sourceXDP3"?>
</DDX>