PDF cheat sheets are quick-reference tools to help developers work more efficiently while ensuring that their knowledge of PDF is technically correct.

An informative representation of the allowable containment of structure element types as defined in ISO/TS 32005.

The Arlington PDF Model is a free and open-source machine-readable data model of all PDF objects.

This page provides external links to all legacy Adobe PDF references and errata, as well as to the ISO 32000 family of standards.

This guide is intended to help designers, composition tool operators and software vendors avoid creating inefficient PDF files that slow workflows and put tight deadlines at risk.

This guide is intended to help developers or software vendors to ensure PDF files can be processed quickly without compromising their visual appearance.

EA-PDF is working to define the essential characteristics and optimal functional requirements for archiving email messages using PDF technology.

The Matterhorn Protocol, a free publication, identifies all possible ways to fail PDF/UA-1.

This free application note summarizes precisely where PDF creators should add XMP metadata to PDF 2.0 objects, and thus where PDF 2.0 processors should search for it.

PDF Declarations facilitate a machine-readable notification that a PDF file (and/or its contents) conform to a given 3rd party specification.