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PDF Know-How

These pages provide detailed technical information about various PDF internals and PDF-related standards:

PDF 2.0: Most important aspects of PDF 2.0 (ISO 32000-2)

PDF Password Security: Applying password protection to PDF documents

PDF Certificate Security: Applying certificate security to PDF documents

PDF/A: Technical details about the archiving standards PDF/A-1, PDF/A-2 and PDF/A-3 according to ISO 19005

PDF/UA:
Technical details about the PDF/UA standard for Universal Accessibility according to ISO 14289

PDF/VT: Technical details about the PDF/VT-1, PDF/VT-2 and PDF/VT-2s standards for variable document and transactional printing according to ISO 16612-2

PDF/X Output Intents: Recommendations for selecting PDF/X output intents and download sources for ICC profiles

XMP Metadata: Technical details about the XMP metadata standard and its use in PDF