Convert XFDF to XML

Understanding XFDF and XML file formats

XFDF (XML Forms Data Format) is a specialized XML-based file format used for representing form data and annotations in PDF documents. It is commonly used to export and import data to and from PDF forms. XML (eXtensible Markup Language), on the other hand, is a general-purpose markup language used for storing and transporting data in a structured, human-readable, and machine-readable format. While XFDF is a subset of XML tailored for PDF forms, converting XFDF to a generic XML format can make the data more accessible for other applications.

Why convert XFDF to XML?

Converting XFDF to XML allows you to repurpose form data for use in other systems, databases, or workflows that require standard XML. This conversion is useful for data integration, migration, or further processing outside the PDF ecosystem.

How to convert XFDF to XML

Since XFDF is already an XML-based format, the conversion process often involves transforming the XFDF structure into a more generic or custom XML schema. This can be achieved using XSLT (Extensible Stylesheet Language Transformations) or specialized software tools.

Recommended software and tools

• Altova XMLSpy: A powerful XML editor that allows you to open XFDF files and transform them into custom XML using XSLT. You can use File → Open to load your XFDF, then apply an XSLT transformation via Transform → XSLT.
• Oxygen XML Editor: Another robust XML editor supporting XSLT transformations. Open your XFDF file, then use Document → Transformation → Configure Transformation Scenario to apply your XSLT and export the result as XML.
• Online XSLT processors: Websites like FreeFormatter or CodeBeautify allow you to upload your XFDF file and an XSLT stylesheet to convert the data to your desired XML format.

Step-by-step conversion process

1. Prepare or obtain an XSLT stylesheet that defines how XFDF elements should be mapped to your target XML structure.
2. Open your XFDF file in your chosen XML editor (e.g., Altova XMLSpy or Oxygen XML Editor).
3. Apply the XSLT transformation using the editor's transformation feature.
4. Save the output as a standard XML file using File → Save As.

Tips for successful conversion

• Review the XFDF schema to understand the data structure before mapping to XML.
• Validate the resulting XML file to ensure it meets your application's requirements.
• If you need a simple structure, you can manually edit the XFDF file, removing PDF-specific tags and keeping only the data elements.