PDF to XML convertion in webmethods

HI All,
Please advice me on how to convert the PDF document to an XML.
Curenlty i have the PDF docuement only.I dont have the XML schema(not sure whether this is required).

Once the XML is created i can convert that to base64 encoded format .:confused:

What would the resulting XML look like? The question is a bit vague sort of like asking how to convert a Word document to a database. We’ll need a bit more detail.