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PDF/A-1 imposes certain requirements and restrictions on document metadata in a compliant PDF/A-1 file where certain information is required to be encoded as XMP metadata, while corresponding entries in the document information dictionary for a documen …

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A PDF/A-1 file must be identified as such by the presence of a certain entry in its XMP document metadata. In order to be able to retrieve this entry reliably, it is essential that all syntactical requirements for storing metadata are followed precisel …

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Digital signatures are primarily used to check the integrity of the signed part of the document. They also can be used to authenticate the signer¬ís identity and determine the time of signing. The concept of digital signatures was introduced in PDF 1.3 …

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The PDF/A-1 requirements related to color handling may be confusing to users and developers who are not familiar with color management concepts and ICC profiles. This TechNote describes the affected objects in PDF, details the requirements of PDF/A-1 w …

ISO 19005 (PDF/A)
Author: PDF Association

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The primary purpose of ISO 19005 is to define a file format based on PDF, known as PDF/A, which provides a mechanism for representing electronic documents in a manner that preserves their static visual appearance over time, independent of the tools and …