<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle19
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Caroline, Murata-san<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>I think we’re going to need to carefully review Part 1 </span><span style='mso-fareast-language:EN-US'>§</span><span style='mso-fareast-language:EN-US'>9 Packages, in particular to make sure that any changes in terminology that we wish to make in Part 2 are consistent with Part 1 (e.g. “ZIP archive”).<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>I’m particularly interested in what </span><span style='mso-fareast-language:EN-US'>§</span><span style='mso-fareast-language:EN-US'>9.1.5 has to say about Trash Items. This implies that a package can contain items that are not Parts, because they don’t have associated content types and they are not the targets of relationships. <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Kind regards,<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Francis<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> caroline arms <caroline.arms@gmail.com> <br><b>Sent:</b> 11 May 2018 11:50<br><b>To:</b> Makoto Murata <eb2m-mrt@asahi-net.or.jp><br><b>Cc:</b> SC34 <e-SC34-WG4@ecma-international.org><br><b>Subject:</b> Another ZIP issue -- Does OPC allow use of split/segmented ZIP file?<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Murata-san,<o:p></o:p></p></div><p class=MsoNormal>Here is another issue that probably needs to be run by Microsoft experts.<o:p></o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>From APPNOTE 6.2.0 -- <a href="https://www.pkware.com/documents/APPNOTE/APPNOTE-6.2.0.txt">https://www.pkware.com/documents/APPNOTE/APPNOTE-6.2.0.txt</a><o:p></o:p></p><div><p class=MsoNormal>"Large .ZIP files can span multiple diskette media or be split into user-defined segment sizes." <o:p></o:p></p></div><div><p class=MsoNormal><br>However, APPNOTE 6.2.0 does not seem to explain how splitting into user-defined segment sizes is done.<o:p></o:p></p><div><p class=MsoNormal><br>Part 2 Annex B appears to disallow "multi-disk archives" in Table B-1<o:p></o:p></p></div><div><p class=MsoNormal>Part 2 does not seem to mention segments or splitting in the context of ZIP<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Part 1 does not seem to say anything about segments in the context of ZIP<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I suspect that we should explicitly disallow splitting into user-defined segment sizes. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Further exploration reveals:<o:p></o:p></p></div><div><p class=MsoNormal><br>APPNOTE 6.3.3 -- <a href="https://www.pkware.com/documents/APPNOTE/APPNOTE-6.3.3.TXT">https://www.pkware.com/documents/APPNOTE/APPNOTE-6.3.3.TXT</a><br>-- which is what ISO/IEC 21320-1 is based on, does explain the splitting/segmenting technique, in clause 8. There is no equivalent text in APPNOTE 6.2.0 <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>ISO/IEC 21320-1 explicitly disallows both spanning multiple volumes and splitting into user-defined segments<o:p></o:p></p></div><div><p class=MsoNormal>Also possibly relevant:<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>From APPNOTE 6.2.0<br>"5) Spanned/Split archives created using PKZIP for Windows<br> (V2.50 or greater), PKZIP Command Line (V2.50 or greater),<br> or PKZIP Explorer will include a special spanning <br> signature as the first 4 bytes of the first segment of<br> the archive. This signature (0x08074b50) will be <br> followed immediately by the local header signature for<br> the first file in the archive. A special spanning<br> marker may also appear in spanned/split archives if the<br> spanning or splitting process starts but only requires<br> one segment. In this case the 0x08074b50 signature<br> will be replaced with the temporary spanning marker<br> signature of 0x30304b50. Spanned/split archives<br> created with this special signature are compatible with<br> all versions of PKZIP from PKWARE. Split archives can<br> only be uncompressed by other versions of PKZIP that<br> know how to create a split archive."<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Part 2 Annex B does mention 0x08074b50 in B.3<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>I was thinking that if you were forwarding a question on unknown parts to Microsoft now, you might send one on this issue too.<o:p></o:p></p></div><div><p class=MsoNormal> Caroline<o:p></o:p></p></div></div></div></div></div></body></html>