Hi Priya.

I had the same question. I'm using Workflow to merge XML to my PDF. I'm french and our tools' names is not exactly the same than yours. I'm trying to translate for you.

First I used "Export the Electronic File" on my XML entry

Then "Read the XML". The Source File should be from my first tool "Export the Electronic File".

Use token to get value from your field.

This is the expression I used : //*[name() = 'field'] (where "field" is the tag's name)

Exemple <field>value</field>

Next, use the tool "search" to find your pdf.

At the end, fill your metadata using the tool "Fill the values"

Use Token1 from "Read the XML"

This should be work.