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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If we are considering citing 6.3.3, I think we need to bring the possibility of citing ISO 21320-1 back on the table. The argument made against that at Seattle, according to the minutes, was that the effort of comparing 6.2 with 6.3.3 (which is what ISO 21320-1 refers to) was not worthwhile. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Like Murata-san, I believe that 6.3.3 and 6.3.2 are equivalent as specifications with the, admittedly many, changes all representing improved formatting for the document, including paragraph numbering to support more specific citation. Changes between 6.2.0 and 6.3.2 should be easier to check with a diff. I’m not certain how Murata-san made his comparison.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>My own analysis of changes associated with chronological versions of APPNOTE (done for a different purpose) is in the History section of Notes near the bottom of http://www.digitalpreservation.gov/formats/fdd/fdd000354.shtml<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>6.3.2 is not on the list. When I did this analysis, I reckoned that changes between 6.3.0 and 6.3.3 were “minor changes, such as corrections or support for an additional compression method.” I am fairly certain I based my analysis on reading change logs.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>My personal preference would be to refer to ISO 21320-1 rather than APPNOTE 6.3.3 unless there is a technical reason not to do so. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> Caroline<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Caroline Arms<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Library of Congress Contractor<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Co-compiler of Sustainability of Digital Formats resource http://www.digitalpreservation.gov/formats/<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>** Views expressed are personal and not necessarily those of the institution **<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> eb2mmrt@gmail.com [mailto:eb2mmrt@gmail.com] <b>On Behalf Of </b>MURATA Makoto<br><b>Sent:</b> Tuesday, March 31, 2015 10:01 PM<br><b>To:</b> SC34<br><b>Subject:</b> Whether to upgrade the ZIP normative reference from appnote 6.2.0 vs. 6.3.2 (6.3.3)<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Dear colleagues,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I quickly compared 6.2, 6.3, and 6.3.3. Technically, I find <o:p></o:p></p></div><div><p class=MsoNormal>three issues: (1) more hash algorithms, (2) UTF-8, and <o:p></o:p></p></div><div><p class=MsoNormal>(3) OPC Growth Hint. I prefer 6.3.3 to 6.2, because of (2).<o:p></o:p></p></div><div><p class=MsoNormal>How do you feel?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards,<o:p></o:p></p></div><div><p class=MsoNormal>Makoto<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>> 6.3.0 -Added tape positioning storage 09/29/2006<o:p></o:p></p></div><div><p class=MsoNormal>> parameters<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Irrelevant since OPC does not use tape positioning storage parameters.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>> -Expanded list of supported hash algorithms<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Three values of Hash ID are added.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> 0x8007 RIPEMD160<o:p></o:p></p></div><div><p class=MsoNormal> 0x800C SHA256<o:p></o:p></p></div><div><p class=MsoNormal> 0x800D SHA384<o:p></o:p></p></div><div><p class=MsoNormal> 0x800E SHA512<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>> <o:p></o:p></p></div><div><p class=MsoNormal>> -Expanded list of supported compression<o:p></o:p></p></div><div><p class=MsoNormal>> algorithms<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Irrelevant since OPC uses DEFLATE and nothing else.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>> -Expanded list of supported encryption<o:p></o:p></p></div><div><p class=MsoNormal>> algorithms<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Irrelevant since OPC does not use ZIP encryption.<o:p></o:p></p></div><div><p class=MsoNormal>> <o:p></o:p></p></div><div><p class=MsoNormal>> -Added option for Unicode filename <o:p></o:p></p></div><div><p class=MsoNormal>> storage<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>This is important if we would like to allow verbatim UTF-8.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>> -Clarifications for consistent use<o:p></o:p></p></div><div><p class=MsoNormal>> of Data Descriptor records<o:p></o:p></p></div><div><p class=MsoNormal>> <o:p></o:p></p></div><div><p class=MsoNormal>> -Added additional "Extra Field" <o:p></o:p></p></div><div><p class=MsoNormal>> definitions<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>This addition includes Growth Hint of OPC. If the <o:p></o:p></p></div><div><p class=MsoNormal>OPC revision uses 6.3.3, it would look more consistent.<o:p></o:p></p></div><div><p class=MsoNormal>But OPC already has Growth Hint anyway.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>> 6.3.1 -Corrected standard hash values for 04/11/2007<o:p></o:p></p></div><div><p class=MsoNormal>> SHA-256/384/512<o:p></o:p></p></div><div><p class=MsoNormal>> <o:p></o:p></p></div><div><p class=MsoNormal>> 6.3.2 -Added compression method 97 09/28/2007<o:p></o:p></p></div><div><p class=MsoNormal>> <o:p></o:p></p></div><div><p class=MsoNormal>> -Documented InfoZIP "Extra Field"<o:p></o:p></p></div><div><p class=MsoNormal>> values for UTF-8 file name and<o:p></o:p></p></div><div><p class=MsoNormal>> file comment storage<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>We should prohibit this field.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>> <o:p></o:p></p></div><div><p class=MsoNormal>> 6.3.3 -Formatting changes to support 09/01/2012<o:p></o:p></p></div><div><p class=MsoNormal>> easier referencing of this APPNOTE<o:p></o:p></p></div><div><p class=MsoNormal>> from other documents and standards <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>This is not technical but purely editorial. But if you compare 6.3.3<o:p></o:p></p></div><div><p class=MsoNormal>and preceding versions, you will find very many differences.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><div><p class=MsoNormal><br>Praying for the victims of the Japan Tohoku earthquake<br><br>Makoto<o:p></o:p></p></div></div></div></div></body></html>