PDF is a digital format for representing documents. PDF files may be created natively in PDF form, converted from other electronic formats, or digitized from paper. Businesses, governments, libraries, archives, and other institutions and individuals around the world use PDF to represent considerable bodies of important information. These PDF files should be made accessible to users with disabilities.
The accessibility of a document is dependent on the inclusion of a variety of semantic information in a document such as (but not limited to) machine-recoverable text presented in a declared language, logical structure of content, and organization of that content in pages, sections, and paragraphs. Semantic information can also contain a variety of descriptive metadata, such as alternative text for images. The primary purpose of ANSI/AIIM/ISO 14289 (known as PDF/UA) is to define how to represent electronic documents in the PDF format in a manner that allows the file to be accessible. This is accomplished by identifying the set of PDF components that may be used and restrictions on the form of their use. PDF/UA is intended as a companion standard, to be used in conjunction with ISO 32000, ISO 19005, ISO 15930, and other standards as may apply for the purpose of achieving accessibility or as mandated by this standard. In order for PDF/UA conforming files to be truly accessible, requirements on conforming readers and conforming assistive technology are also stipulated.
This part of ANSI/AIIM/ISO 14289 specifies the use of ISO 32000-1:2008 to produce accessible electronic documents.
This part of ANSI/AIIM/ISO 14289 is not applicable to:
- Specific processes for converting paper or electronic documents to the PDF/UA format;
- Specific technical design, user interface, implementation, or operational details of rendering;
- Specific physical methods of storing these documents such as media and storage conditions;
- Required computer hardware and/or operating systems