Sustainability of Digital Formats
Planning for Library of Congress Collections
Sustainability of Digital Formats
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| Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact | |
| Full name | PDF (Portable Document Format), version 1.4 |
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| Description |
PDF (Portable Document Format), developed by Adobe Systems Incorporated, is described by Adobe as a general document representation language. PDF represents formatted, page-oriented documents. These documents may be structured or simple. They may contain text, images, graphics, and other multimedia content, such as video and audio. There is support for annotations, metadata, hypertext links, and bookmarks. Version 1.4 was the basis for the first versions of ISO standards PDF/X and PDF/A. |
| Production phase | In general, a final-state format for delivery to end users. PDF/X, based on PDF 1.4 is a middle-state format for submission of images to printers (prepress). |
| Relationship to other formats | |
| Subtype of | PDF, Portable Document Format |
| Has earlier version | PDF_1_3, PDF, Versions 1.0-1.3 |
| Has later version | PDF_1_5, PDF, Version 1.5 |
| Has subtype | PDF/A-1, PDF for Long-term Preservation, Use of PDF 1.4. The first version of PDF/A was based on PDF 1.4 |
| Has subtype | PDF/X, PDF for Prepress Graphics File Exchange. The first version of PDF/X was based on PDF 1.4 |
| LC experience or existing holdings | See PDF. |
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| LC preference | See PDF. |
| Disclosure | See PDF. |
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| Documentation | See PDF. Version 1.4 spec is at http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/pdf_reference_archives/PDFReference.pdf. |
| Adoption | TBD |
| Licensing and patents | See PDF. |
| Transparency | See PDF. |
| Self-documentation | Version 1.4 can include XMP metadata packages. XMP is Adobe's framework for including arbitrary blocks of metadata, using a representation in RDF. |
| External dependencies | See PDF. |
| Technical protection considerations | See PDF. |
| Text | |
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| Normal rendering | See PDF. |
| Integrity of document structure | See PDF. |
| Integrity of layout and display | See PDF. |
| Support for mathematics, formulae, etc. | See PDF. |
| Functionality beyond normal rendering | See PDF. |
| Tag | Value | Note |
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| Filename extension | pdf |
See PDF. |
| General | |
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| History | PDF 1.4 was published in November 2001, and corresponds to Acrobat version 5. PDF 1.4 was incorporated into the first versions of the PDF/X and PDF/A ISO standards. |
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