Export of PDF/A-1a faulty ?
Hi, AOO 4 under Win 7 Pro x64. I've exported a Calc sheet as PDF/A-1a file, looked in Acrobat 8 Pro the properties: No security. I opened the PDF/A file in AOO 4 with aoo-pdf-import 0.1.0, could correct and save it again as PDF/A-1a file. (In Acrobat no security again.) Perhaps I do not understand correctly, but I think exporting a PDF/A-1a file which can easily be changed is a bug? -- Grüße Günter Marxen - To unsubscribe, e-mail: dev-unsubscr...@openoffice.apache.org For additional commands, e-mail: dev-h...@openoffice.apache.org
Re: Export of PDF/A-1a faulty ?
Hi Guenter, I've exported a Calc sheet as PDF/A-1a file, looked in Acrobat 8 Pro the properties: No security. I opened the PDF/A file in AOO 4 with aoo-pdf-import 0.1.0, could correct and save it again as PDF/A-1a file. (In Acrobat no security again.) Perhaps I do not understand correctly, but I think exporting a PDF/A-1a file which can easily be changed is a bug? PDF/A is a document format for long term preservation so it has some constraints to facilitate this. See ISO 19005 for details or [1] (provided by the Library of Congress) for an overview over these constraints. Here is the relevant excerpt: - Encryption is disallowed - Audio and video content are forbidden - Javascript and executable file launches are prohibited - All fonts must be embedded and also must be legally embeddable for unlimited, universal rendering - Colorspaces specified in a device-independent manner - Use of standards-based metadata is mandated [1] http://www.digitalpreservation.gov/formats/fdd/fdd000125.shtml Herbert - To unsubscribe, e-mail: dev-unsubscr...@openoffice.apache.org For additional commands, e-mail: dev-h...@openoffice.apache.org
Re: Export of PDF/A-1a faulty ?
Hi Herbert, Am 01.08.2013 13:38, schrieb Herbert Duerr: PDF/A is a document format for long term preservation so it has some constraints to facilitate this. See ISO 19005 for details or [1] (provided by the Library of Congress) for an overview over these constraints. Here is the relevant excerpt: - Encryption is disallowed - Audio and video content are forbidden - Javascript and executable file launches are prohibited - All fonts must be embedded and also must be legally embeddable for unlimited, universal rendering - Colorspaces specified in a device-independent manner - Use of standards-based metadata is mandated [1] http://www.digitalpreservation.gov/formats/fdd/fdd000125.shtml many thanks. Without knowing the details I had in mind, that archived pdf documents were revisionssicher. Are there tools, to produce readable really protected pdf documents? (Adobe gives a warning in Acrobat Pro 8, that third party tools can bypass this sort of password protection of pdf files.) -- Grüße Günter Marxen - To unsubscribe, e-mail: dev-unsubscr...@openoffice.apache.org For additional commands, e-mail: dev-h...@openoffice.apache.org
Re: Export of PDF/A-1a faulty ?
Hi Guenter, PDF/A is a document format for long term preservation so it has some constraints to facilitate this. See ISO 19005 for details or [1] (provided by the Library of Congress) for an overview over these constraints. Here is the relevant excerpt: - Encryption is disallowed - Audio and video content are forbidden - Javascript and executable file launches are prohibited - All fonts must be embedded and also must be legally embeddable for unlimited, universal rendering - Colorspaces specified in a device-independent manner - Use of standards-based metadata is mandated [1] http://www.digitalpreservation.gov/formats/fdd/fdd000125.shtml many thanks. Without knowing the details I had in mind, that archived pdf documents were revisionssicher. You probably want the signed PDFs and checking them ensures a PDF has not been tampered with. AOO doesn't yet support it [1], but there are third-party tools for signing the PDF or for encrypting the file itself. [1] https://issues.apache.org/ooo/show_bug.cgi?id=47895 Are there tools, to produce readable really protected pdf documents? Depends what you mean. Signing with strong cryptography gives a good assurance that it hasn't been tampered with. Herbert - To unsubscribe, e-mail: dev-unsubscr...@openoffice.apache.org For additional commands, e-mail: dev-h...@openoffice.apache.org
Re: Export of PDF/A-1a faulty ?
Hi Herbert, Am 01.08.2013 16:30, schrieb Herbert Duerr: You probably want the signed PDFs and checking them ensures a PDF has not been tampered with. AOO doesn't yet support it [1], but there are third-party tools for signing the PDF or for encrypting the file itself. [1] https://issues.apache.org/ooo/show_bug.cgi?id=47895 many thanks for the infos. -- Grüße Günter Marxen - To unsubscribe, e-mail: dev-unsubscr...@openoffice.apache.org For additional commands, e-mail: dev-h...@openoffice.apache.org
