PDF/A-1a conformance level (Level A) - Full accessibility and tagged PDF support.
PDF/A-1b conformance level (Level B) - Basic visual appearance preservation.
PDF/A-2a conformance level (Level A) - Enhanced accessibility with JPEG 2000 and transparency support.
PDF/A-2b conformance level (Level B) - Basic visual appearance preservation with JPEG 2000 and transparency support.
PDF/A-2u conformance level (Level U) - Unicode mapping requirement with JPEG 2000 and transparency support.
PDF/A-3a conformance level (Level A) - Full accessibility with embedded files support.
PDF/A-3b conformance level (Level B) - Basic visual appearance preservation with embedded files support.
PDF/A-3u conformance level (Level U) - Unicode mapping with embedded files support.
PDF/A-4 conformance level - Latest standard based on PDF 2.0 with enhanced features.
PDF/A-4e conformance level - Engineering variant with 3D support.
PDF/A-4f conformance level - Enhanced support for embedded files.
Represents one of the available conformance types for PDF/A documents.