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On 03/21/2011 11:44 PM, Steve Edmonds wrote:

As pointed out, it may not be possible to package fonts in the document
file because of the Open Document standard, although I would have though
it would have been flexible enough to enable packaging of future items,
otherwise it would be limiting to development and future inclusion of
say media or as of yet unpopularised formats.

Fonts used for editing documents must be installed at operating system level (Windows, MacOS, Linux) and therefore they would not be available even if embedded in documents. In addition fonts have different metrics on different operating systems.

This is the reason why fonts have never been embedded in any document format for editing (not even in old Microsoft proprietary formats, even if they were a memory dump), because if they are not installed there is no chance of having them available for editing.

Font embedding in PDF is a completely different story. PDF is a document description format based on PostScript, and thus the engine in the software can use the embedded fonts to render them on screen thanks to the code developed by John Warnock (a genius developer, the inventor of PostScript and one of the founders of Adobe).

This feature was introduced in PDF 2.0, because the first version was using Minion and Myriad, specific fonts with real time variable metrics which had to be installed at system level in order to mimic the fonts used to produce the document.

I was working as a consultant for Adobe at that time, and I have been the PDF spokeperson for Europe for several years.

It is true that many years have gone by, but fonts are handled by operating systems in the same way. If they are not installed in their specific folder at boot time, they cannot be used for editing documents.

I hope this helps.

Italo Vignoli
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