The PDF/A Competence Center (PDFACC) has announced that the International Standards Organization (ISO) has published an update to the PDF/A standard. Formally known as ISO 19005-2, the new version is referred as PDF/A-2. The latest standard supports compression, transparency effects and layers, embedding OpenType fonts, digital signatures.
The PDF/A-2 standard is based on PDF 1.7, the recent version of PDF (ISO 32000-1). The new standard features a number of beneficial technical innovations including:
Efficient JPEG2000 compression
Supports transparency effects and layers
Supports embedding OpenType fonts
Provision for digital signatures as per PDF Advanced Electronic Signatures (PAdES)
Supports embedding one or more PDF/A files in a single PDF/A-2 document
The PDF/A Competence Center (PDFACC) was founded as an international association to address the high-demand for information about PDF/A and to promote the exchange of ideas and experience. Learn more about PDF/A Competence Center and PDF/A at PDFACC website.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.