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Import form data into PDF
Merge Form Data File (FDF) to PDF Forms in Ruby
To import XFDF into FDF, then merge data from FDF into PDF
# Import annotations from XFDF to FDF
fdf_doc = FDFDoc.CreateFromXFDF(xfdf_filename)
# Optionally read XFDF from a string
fdf_doc = FDFDoc.CreateFromXFDF(xfdf_string)
# Merge FDF data into PDF doc
doc = PDFDoc.new(filename)
doc.FDFMerge(fdf_doc)PDF Form fill and form data extraction
Full sample code which illustrates basic FDF merge/extract functionality and full support for FDF (Forms Data Format)
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