![]() ![]() The use of XML-based XML Forms Architecture (XFA) forms is forbidden in PDF/A.PDF/A-3 allows embedding of any file format such as XML, CAD and others into PDF/A documents. Embedded files are forbidden in PDF/A-1, but PDF/A-2 allows embedding of PDF/A files, facilitating the archiving of sets of PDF/A documents in a single file.Provisions for digital signatures in accordance with the PAdES (PDF advanced electronic signatures) standard are supported in PDF/A-2.Transparent objects and layers (Optional Content Groups) are forbidden in PDF/A-1 but are allowed in PDF/A-2.JPEG 2000 compression is allowed in PDF/A-2 and PDF/A-3. JPEG 2000 image compression models are not allowed in PDF/A-1 (based on PDF 1.4), as it was first introduced in PDF 1.5. LZW is forbidden due to intellectual property constraints.External content references are forbidden.Use of standards-based metadata is required.Colorspaces specified in a device-independent manner.This also applies to the so-called PostScript standard fonts such as Times or Helvetica. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |