Standards
PDF/A-1 is based on the PDF Reference Version 1.4 from Adobe Systems Inc. (implemented in Adobe Acrobat 5 and later versions) and is defined by ISO 19005-1:2005, an ISO Standard that was published on October 1, 2005: Document Management – Electronic document file format for long term preservation – Part 1: Use of PDF 1.4 (PDF/A-1)
PDF/A-2 is based on ISO 32000-1 – PDF 1.7 and is defined by ISO 19005-2:2011, published on June 20, 2011 under the formal name Document management – Electronic document file format for long-term preservation – Part 2: Use of ISO 32000-1 (PDF/A-2). PDF/A-2 is a very recent standard and is not widely used.
PDF/A-3 is based on ISO 32000-1 – PDF 1.7 and is defined by ISO 19005-3:2012, published on October 15, 2012 under the formal name Document management -- Electronic document file format for long-term preservation -- Part 3: Use of ISO 32000-1 with support for embedded files (PDF/A-3).
| Part | Name | Formal name | Release date | Standard | Based on PDF version |
|---|---|---|---|---|---|
| Part 1 | PDF/A-1 | Use of PDF 1.4 (PDF/A-1) | 2005 | ISO 19005-1 | PDF 1.4 (Adobe Systems, PDF Reference third edition, 2001) |
| Part 2 | PDF/A-2 | Use of ISO 32000-1 (PDF/A-2) | 2011 | ISO 19005-2 | PDF 1.7 (ISO 32000-1:2008) |
| Part 3 | PDF/A-3 | Use of ISO 32000-1 with support for embedded files (PDF/A-3) | 2012 | ISO 19005-3 | PDF 1.7 (ISO 32000-1:2008) |
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Famous quotes containing the word standards:
“That’s the great danger of sectarian opinions, they always accept the formulas of past events as useful for the measurement of future events and they never are, if you have high standards of accuracy.”
—John Dos Passos (1896–1970)
“In full view of his television audience, he preached a new religion—or a new form of Christianity—based on faith in financial miracles and in a Heaven here on earth with a water slide and luxury hotels. It was a religion of celebrity and showmanship and fun, which made a mockery of all puritanical standards and all canons of good taste. Its standard was excess, and its doctrines were tolerance and freedom from accountability.”
—New Yorker (April 23, 1990)
“A generation which has passed through the shop has absorbed standards and ambitions which are not of those of spaciousness, and cannot get away from them. Everything with them is done as though for sale, and they naturally have in view the greatest possible benefit, profit and that end of the stuff that will make the best show.”
—Alexander Herzen (1812–1870)