Hi,
What the Paul said is actually correct. However most of the time form is changing a lot so you have to change the schema before changing the form if starting from schema.
If you design the document first, you can generate the schema later by using the exported data of the PDF. There exists some free tools to convert XML data to XSD schema.
In case of any consultancy issues and huge number of PDF designs needed in small periods, we develop and design PDF documents.
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