Why PDF 2.0, and why now
NextPDF builds on the PDF 2.0 (ISO 32000-2) object model, with tagged structure, PAdES signatures, and PDF/A-4 archival profiles in scope.
NextPDF journal
Standards
Explore three implementation subjects: current-format foundations, hybrid invoicing, and tagged accessibility. Begin with the format overview, then follow the invoice or tagged-document workflow that matches your application.
Hybrid e-invoicing in PHP: ZUGFeRD and Factur-X
EU e-invoicing rules increasingly require structured invoice data in covered workflows. A hybrid file pairs a readable PDF with data for tax and procurement systems. NextPDF Enterprise produces both layers.
Tagged PDFs and the EU Accessibility Act
Tagged structure gives assistive technology headings, reading order, and alternative-text fields. For documents within scope, EU accessibility rules make that structure a requirement. NextPDF emits the structure.