Overview
ISO 19444-1:2019 - Document management - XML Forms Data Format - Part 1: Use of ISO 32000-2 (XFDF 3.0) defines an XML-based interchange format (XFDF 3.0) for representing PDF form data and PDF annotations in PDF 2.0 (ISO 32000-2). The standard specifies the XML structure, encoding and namespace conventions, and element vocabulary used to export, import or exchange forms data and annotations without changing any component definitions in ISO 32000-2.
Key topics and requirements
This part of ISO 19444 focuses on practical XML mapping for PDF 2.0 content. Key technical topics include:
- XFDF overview and use - purpose, relationship between PDF, FDF and XFDF, and guidance on when to use XFDF.
- Forms data representation - XML elements for form fields, hierarchical and simple form structures, and value encodings.
- Annotations model - XML elements covering common annotation types (e.g., text, highlight, underline, strikeout, squiggly, line, polygon, free text, stamp, ink, file attachment, sound, link, redact, projection).
- Element and sub-element definitions - detailed reference for xfdf, f, ids, fields, field/value, annots and annotation sub-elements (appearance, contents, popup, actions, resources, destinations).
- Encoding and namespaces - string encoding conventions, rich text handling, and stream encoding guidance.
- Implementation notes and samples - examples comparing FDF and XFDF, sample annotations and forms, and XML content model syntax to aid implementers.
The standard does not introduce new PDF component definitions and explicitly does not change ISO 32000-2 - it maps PDF semantics into an XML exchange format.
Applications and who should use it
ISO 19444-1:2019 is intended for:
- Software developers building PDF viewers, form-fill engines, annotation tools, and document management systems that need to import/export PDF form data and annotations as XML.
- Enterprise workflows that exchange form submissions or annotations between systems (e.g., e‑forms, legal review, archival ingestion).
- Integration specialists creating connectors between PDF workflows and XML-based services (web services, databases, content repositories).
- Archivists and record managers needing a standards-based, machine-readable representation of PDF annotations and form content for preservation.
Benefits include interoperable exchange of form values and annotation metadata, simplified processing in XML toolchains, and clearer mapping between PDF 2.0 semantics and XML workflows.
Related standards
- ISO 32000-2 (PDF 2.0) - normative reference for PDF structures and semantics used by XFDF 3.0.
- FDF/XFDF legacy notes - background on the relationship to earlier FDF/XFDF versions for compatibility planning.
Keywords: ISO 19444-1:2019, XFDF 3.0, XML Forms Data Format, PDF 2.0, ISO 32000-2, forms data, PDF annotations, document management.
Open preview (PDF)Document management — XML Forms Data Format — Part 1: Use of ISO 32000-2 (XFDF 3.0)
