PDF - a multifaceted classic. Numerous specifications and special versions of the Portable Document Format.
Developed by Adobe Systems in 1994, the Portable Document Format (PDF) was and remains, by virtue of continuous advances, the worldwide standard for electronic data exchange. It was the first platform-independent exchange format for electronic documents and its many benefits put it front and center in nearly all market segments. Numerous special versions have emerged over the years that address the special requirements of specific industries and areas of application.
PDF/X (PDF for Exchange)
PDF/X (PDF for Exchange) was the first ISO standard for PDF and grew out of the very special requirements of the graphics and print industry. The standard was published in 2001 and regulates the transmission of print templates. It has been continually developed since then. In digital prepress, PDF/X is the most widely used format today.
- Contains all data for fonts, graphics and print-out in high resolution
- Fully embedded fonts
- Storage of color profiles – precise definition of color management
- Current release: PDF-X5.
PDF/A (PDF for Archive)
PDF/A (PDF for Archive) for compact, long-term electronic archiving, an ISO standard since 2005. This standard was developed to meet the need to archive large numbers of documents with the ability to display them countless years later in the same quality as the day they were generated (with all the stored fonts, colors, logos, graphics, etc.) Many properties of PDF/A originated in PDF/X, such as correct embedding of fonts and colors.
- Font subsetting as a means of keeping the PDF file compact
- Embedding of digital signatures
- Exact definition and storage of color profiles
- Encryption and locking (password protection) are prohibited
- No context-dependent and dynamic functions that could change the content and layout (barcodes, audio/video data)
- PDF/A-1a: Guarantees that the text content is extractable and the logical structure of the document as well as the natural reading process of the integrated text material remains the same
- PDF/A-1b: Guarantees that text and other page content are clearly reproduced; however does not guarantee that either is understandable and readable
- PDF/A-2: Standard pending certification with new enhancements for merging several output files into one PDF/A container and Unicode capability.
PDF/E (PDF for Engineering)
Standard format for technical documents from engineering, architecture and geoinformation. Adopted in 2008, this standard may eventually be integrated into PDF/A as a special version of the PDF archiving standard.
- Display and interactive processing of 3D graphics and models
- Exchange of plans, drawings and other construction documents
PDF/VT (PDF for Variable Transaction Output)
This format allows incorporating variable data into the PDF, guaranteeing a secure end-to-end process. The international standard, published by ISO in August 2010, has many advantages over previous formats for printing variable data, especially maximum interoperability. In PDF/VT, the well-known assets of PDF are combined with several special PDF/X functions and are now available for the world of personalized printing. This includes long-term archiving, since PDF/VT can be seamlessly converted into PDF/A format.
PDF/VT was developed because more and more companies are delivering their printed files in PDF format, which is not as practical as AFP for large volumes of output (see AFP Glossary). The development of PDF/VT also advances the convergence of offset print files and variable digital data printing. Experts assume that the PDF/VT and AFP will initially enjoy equal status on the market.
PDF/UA (PDF for Universal Accessibility)
This format allows to create and display documents that are also accessible to users with impaired sight or motor skills. The objective of the yet-to-be-established ISO standard is to define how PDF documents and the information elements they contain (graphics, text, multimedia, form fields) must be made accessible to this segment of the population (freedom from barriers).
- Defines the sequence and language in which the text must be read
- Takes into account/ignores delimiters
- Tagging principle: what text passages and blocks belong together? What should not be read (e.g., page numbers, headers/footers, comments, source citations)?
- Storage of document structure, reading direction, and pronunciation.
PDF/H (PDF for Healthcare)
This format was developed with the support of the Committee on Healthcare Informatics of the American Society for Testing and Materials (ASTM). It is designed for the standardized exchange of patient data in healthcare. The idea underlying the format was to create an electronic "container" using the advantages and functions of PDF for archiving and data exchange between all the participants: clinics, hospitals, patients, private physicians, and insurance companies.
PDF/H can save the following data:
- Clinical reports
- Laboratory reports
- Image data
- X-ray and CT images
- ECG and EEG data
Its platform-independence and sophisticated functions for embedding various types of resources and data make PDF an excellent format for long-term storage and display of important medical data that is true to the original.
PDF Conversion Directions
A complete overview of all supported input and output formats is provided in the Compart Matrix. Compart software solutions enables highly complex, single pass operations with flexibility and reliability for high availability, high volume environments.