Unknown Fields (intentionally corrupt FDF)
Intentionally corrupt. An FDF bound to acro-checkbox-matrix.pdf that sets two fields the PDF does not define and omits four that it does. A filler should report the unknown names rather than discard them silently.
%FDF-1.2
1 0 obj
<< /FDF << /Fields [
<< /T (inspection_passed) /V (Yes) >>
<< /T (photos_attached) /V (Off) >>
<< /T (field_that_does_not_exist) /V (SAMPLE) >>
<< /T (engineer) /V (Sample Engineer) >>
<< /T (warranty_months) /V (24) >>
] /F (acro-checkbox-matrix.pdf) >> >>
endobj
trailer
<< /Root 1 0 R >>
%%EOF
Specifications
- Corrupt
- true
- Bound To
- acro-checkbox-matrix.pdf
- Fields
- 5
- Unknown Fields
- 2
- Defect
- names values the target PDF does not define
What is a .fdf file?
FDF (Forms Data Format) is Adobe's format for carrying the field values of a PDF form separately from the document itself. An FDF file lists each form field name and its value and can reference the PDF it belongs to, so form data can be exchanged, imported, and exported without resending the whole PDF. It is the classic companion to interactive AcroForm PDFs.
How to use this file
Use an example FDF to test importing and exporting PDF form data, populating an AcroForm from external values, and round-tripping between a PDF form and its data file.
How to use this file for testing
“Unknown Fields (intentionally corrupt FDF)” is a deterministic Novus Examples fixture for Form testing, PDF form filling, AcroForm, Form parsing. HTML and PDF form files for testing scrapers, autofill, validators, and PDF form fillers across real-life use cases.
Documented properties for this file: 5 fields. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
This form is fictional SAMPLE content for tooling tests (autofill, scrapers, PDF fillers). It is not an official government, bank, or clinic form. Open the HTML offline or fill the PDF in any viewer; the demo submit path never stores data.
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Generated by generation/forms_p7.py. Free for any use, no attribution required — license.