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comments and annotations (defined list of acceptable and prohibited annotation and comment types for PDF/A-2).object level XMP metadata (new requirements for custom metadata).transparency, optional content (layers): useful for mapping or engineering drawings or documents with multiple languages (implement different content on different layers).embedded PDF/A files via collections/portfolios.support for JPEG2000 compression (benefits for scanned color documents).

PDF/A-2 (support for 2a, 2b and 2u): PDF/A-2 is based on the ISO standard 32000-1 and takes advantage of features that came after the Adobe PDF 1.4 specification. This level guarantees that the document can be displayed and read on a computer monitor, but the legibility of the text is not guaranteed. PDF/A-1b: Referred to as Level B Conformance, this category is considered to be the minimal compliance level for PDF/A. This version includes tagging, so that text can be extracted and viewed by multiple devices including hand-helds. PDF/A-1a: This level, also referred to as Level A Conformance, is fully compliant with the ISO 19005-1 Standard. Solid PDF Tools and Solid PDF/A Express support the following PDF/A formats: You can now reconstruct a selected area of a PDF page directly to the clipboard in multiple formats with a single click. Selective conversion is much improved and simplified.