The emergence of large language models capable of understanding document structure has created new integration challenges for PDF workflows. PDFs are a primary input format for enterprise AI pipelines — but the quality of AI output depends heavily on the quality of PDF parsing. A tagged PDF with correct reading order, heading structure, and table markup produces significantly better results when fed into an LLM-based document processing system than an untagged flat PDF. Key themes from this track: - Structured PDF extraction for RAG (Retrieval-Augmented Generation) pipelines — how document structure affects chunk quality - AI-assisted PDF remediation — using LLMs to detect and fix accessibility errors in untagged PDFs - PDF/UA as a quality signal — accessible PDFs produce better AI-processed outputs - The role of XMP metadata and document properties in retrieval ranking The conference sessions cover both the technical specification side (how PDF structure supports AI parsing) and the practical workflow side (tools and pipelines for enterprise document AI).

The European Accessibility Act came into force on 28 June 2025 for products and services across EU member states. PDF Days Europe 2026 is the first conference post-enforcement, making it a timely forum for reviewing real-world implementation experience. Key questions addressed in the EAA track: - Which national enforcement bodies are actively checking document accessibility, and what methods are they using? - What does a credible PDF/UA conformance process look like for organisations with large document backlogs? - How does EAA interact with EN 301 549 (the European accessibility standard for ICT), which explicitly references PDF/UA (ISO 14289)? - For B2C businesses distributing PDFs (insurance documents, bank statements, e-commerce receipts): what does compliance require in practice? The PAC (PDF Accessibility Checker) remains the primary conformance testing tool for PDF/UA. Sessions cover automated vs manual testing, the Matterhorn Protocol for PDF/UA conformance checking, and practical remediation workflows using veraPDF.

PDF 2.0 (ISO 32000-2:2017) is the current PDF specification. ISO Technical Committee 171, Subcommittee 2 (PDF) is working on the next revision, informally referred to as PDF 2.1, which addresses errata, ambiguities, and new features that have emerged since the 2017 publication. PDF 2.1 development areas covered at the 2026 conference include: - Errata resolution — clarifications to the PDF 2.0 text that have caused interoperability issues between implementations - Tagged PDF improvements — new structure element types and attribute improvements for better accessibility representation - Digital signatures — updates to long-term validation (LTV) data structures - PDF 2.0 test suite — the conformance test suite maintained by the PDF Association for verifying PDF 2.0 implementation correctness Implementers using pdf-lib, iText, or PDFium benefit from tracking PDF 2.1 development to anticipate changes to the specification that affect their implementations.