Overview
ISO/TS 32005:2023 clarifies how the PDF 1.7 and PDF 2.0 standard structure namespaces can be used together in tagged PDF documents. It specifies containment and inclusion requirements that extend - and remain fully compliant with - the structural rules already set out in ISO 32000-2. The Technical Specification removes ambiguity around namespace interaction, role mapping, attributes and parent–child hierarchy rules when both the PDF 1.7 and PDF 2.0 namespaces appear in the same file.
Key topics and requirements
- Containment requirements for tagged PDF: Defines how structure elements from PDF 1.7 and PDF 2.0 namespaces may be combined in the document structure.
- Versioning rule: Documents that use these combined namespaces shall be versioned as PDF 2.0 (header or Catalog Version entry).
- PDF 1.7 as standalone: If all structure elements are exclusively PDF 1.7 (or mapped to the default namespace), ISO 32000-1 rules apply and namespace usage is optional.
- Common elements: Elements defined in both namespaces must use the PDF 2.0 namespace and follow ISO 32000-2 inclusion rules (see Annex L of ISO 32000-2).
- Unique PDF 1.7 elements: Permitted grouping and inline element types from PDF 1.7 (e.g., Art, BlockQuote, TOC, TOCI, Index, Private, Quote, Note) are allowed as children of PDF 2.0 elements, but must follow the specified inclusion rules.
- Role mapping, attributes and hierarchy: Clauses cover role mapping (5.6), attribute ownership and namespaces (Clause 6), and hierarchical parent–child inclusion rules across both namespaces (Clause 7).
- Conformance declaration: A PDF may include a PDF Declarations entry to claim conformance to ISO/TS 32005 using the URI https://pdfa.org/declarations#iso32005 and must follow the PDF Declarations specification.
Practical applications
- Ensures interoperable creation and exchange of tagged PDF documents that mix legacy PDF 1.7 structure types with PDF 2.0 features.
- Helps implementors of PDF generators, validators and accessibility tools produce files that are compliant and predictable in structure.
- Useful for organizations focused on digital preservation, accessibility (screen readers, assistive tech), enterprise content management (ECM) and automated content extraction.
- Supports QA and conformance testing in publishing, archiving and regulated industries that rely on precise semantic structure in PDFs.
Who should use this standard
- PDF software developers and library maintainers
- Accessibility specialists and document architects
- Archivists and records managers
- QA engineers and standards compliance officers
Related standards
Keywords: ISO/TS 32005, tagged PDF, PDF 1.7, PDF 2.0, ISO 32000-2, structure namespace, role mapping, PDF conformance, PDF declarations.
Open preview (PDF)Document management — Portable Document Format — PDF 1.7 and 2.0 structure namespace inclusion in ISO 32000-2
