A colleague, Jim King, submitted a note about the methods used for managing versioning of PDF, as a contribution to the ISO PDF standard (PDF ownership has moved to ISO, and the committee is considering a new version after ISO 32000-1, I believe). The paper: http://blogs.adobe.com/insidepdf/Compatibility_090819.pdf Referred to Jim's blog entry: http://blogs.adobe.com/insidepdf/2009/08/pdf_evolution_and_compatibilit.html Although there are differences between PDF and HTML in deployment, the compatibility goals (new versions of software handles old files, old software gracefully handles new files) are quite similar. LarryReceived on Friday, 21 August 2009 00:05:14 UTC
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