<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On May 3, 2018, at 3:33 PM, Urs Schnurrenberger <<a href="mailto:urs.schnurrenberger@unibas.ch" class="">urs.schnurrenberger@unibas.ch</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Hi Junxiao,<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">thanks for the answers and the link. I have a follow-up question:<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">What then happens when the (same as below) Interest<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""> /nytimes/frontpage | CanBePrefix=true | MustBeFresh=true<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">arrives at a cache with the sole content<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""> <span class="Apple-converted-space"> </span></span><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">/nytimes/frontpage/addBanner/v23 | 60'000ms<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">?<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">According to prefix matching and a positive freshnessPeriod, will I receive the addBanner only and never the complete front page?<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""><o:p class=""> </o:p></span></div></div></div></blockquote><div>Yes, but the publisher would be shooting themselves in the foot to publish it with such a structure. They're much more likely to publish</div></div><div><br class=""></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>/nytimes/frontpage/v105/adBanner/v23 | 60000 ms</div><div><br class=""></div><div>They would also be smarter to publish with a date coded version so an application could make an educated guess at the version it should be retrieving.</div><div>Namespace design for an application (or class of applications) is really important in order for things to work smoothly.</div><div><br class=""></div><div>This issue was why the original CCN protocol specification had MinSuffixComponents/MaxSuffixComponents optionally on the Interest so the application wouldn't get shut out by longer names that were long lived and shadowed the shorter name you were looking for. I think that got dropped somewhere in the evolution of NDN, but I don't know where. </div><div><br class=""></div><div><blockquote type="cite" class=""><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Best regards,<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Urs<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><b class=""><span lang="DE" class="">Von:</span></b><span lang="DE" class=""><span class="Apple-converted-space"> </span>Junxiao Shi <<a href="mailto:shijunxiao@email.arizona.edu" style="color: purple; text-decoration: underline;" class="">shijunxiao@email.arizona.edu</a>><span class="Apple-converted-space"> </span><br class=""><b class="">Gesendet:</b><span class="Apple-converted-space"> </span>Donnerstag, 3. Mai 2018 23:37<br class=""><b class="">An:</b><span class="Apple-converted-space"> </span>Urs Schnurrenberger <<a href="mailto:urs.schnurrenberger@unibas.ch" style="color: purple; text-decoration: underline;" class="">urs.schnurrenberger@unibas.ch</a>><br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span><a href="mailto:ndn-interest@lists.cs.ucla.edu" style="color: purple; text-decoration: underline;" class="">ndn-interest@lists.cs.ucla.edu</a><br class=""><b class="">Betreff:</b><span class="Apple-converted-space"> </span>Re: [Ndn-interest] Freshness & Latest Content<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Hi Urs<o:p class=""></o:p></span></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div><div class=""><blockquote style="border-style: none none none solid; border-left-color: rgb(204, 204, 204); border-left-width: 1pt; padding: 0cm 0cm 0cm 6pt; margin: 5pt 0cm 5pt 4.8pt;" class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">I have some conceptual questions about freshness and how to ask for latest content.</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""> </span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Imagine 2 properly versioned versions of /nytimes/frontpage (properly in the sense of<span class="Apple-converted-space"> </span></span><span style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">“<span lang="EN-US" class="">larger</span>”<span lang="EN-US" class=""><span class="Apple-converted-space"> </span>version =<span class="Apple-converted-space"> </span></span>“<span lang="EN-US" class="">newer</span>”<span lang="EN-US" class=""><span class="Apple-converted-space"> </span>version, according to [1]):</span></span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">format : contentName | freshnessPeriod</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 35.4pt;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">/nytimes/frontpage/v100 | 100ms [stored at cache X somewhere between requester and producer]</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 35.4pt;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">/nytimes/frontpage/v105 | 300ms [stored at producer]</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""> </span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">I assume that if a user does only know about the contentName (prefix), but not about the latest versionNumber, he/she asks for</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 35.4pt;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Interest: /nytimes/frontpage | CanBePrefix=true | MustBeFresh=true</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div></div></div></blockquote><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Yes, that's what consumer should ask for.<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""> </span><span lang="EN-US" class=""><o:p class=""></o:p></span></div></div><blockquote style="border-style: none none none solid; border-left-color: rgb(204, 204, 204); border-left-width: 1pt; padding: 0cm 0cm 0cm 6pt; margin: 5pt 0cm 5pt 4.8pt;" class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Question 1:</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Is it correct that this Interest is satisfied by cache X because there is a prefix match on the contentName and a freshnessPeriod > 0?</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div></div></div></blockquote><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Yes, X will return /nytimes/frontpage/v100 until it becomes non-fresh.<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""> </span><span lang="EN-US" class=""><o:p class=""></o:p></span></div></div><blockquote style="border-style: none none none solid; border-left-color: rgb(204, 204, 204); border-left-width: 1pt; padding: 0cm 0cm 0cm 6pt; margin: 5pt 0cm 5pt 4.8pt;" class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Question 2:</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Assuming the answer to Q1 is<span class="Apple-converted-space"> </span></span><span style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">‘<span lang="EN-US" class="">yes</span>’<span lang="EN-US" class=""><span class="Apple-converted-space"> </span>and that the reuqester does NOT know the latest versionNumber, is there really no possibility for the requester to get the globally latest version v105 directly from the producer?</span></span><span lang="EN-US" class=""><o:p class=""></o:p></span></div></div></div></blockquote><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">It is possible but requires changes on producer. See </span><a href="https://redmine.named-data.net/issues/4396#note-1" target="_blank" style="color: purple; text-decoration: underline;" class=""><span lang="EN-US" class="">https://redmine.named-data.net/issues/4396#note-1</span></a><span lang="EN-US" class=""> <o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""> <o:p class=""></o:p></span></div></div><blockquote style="border-style: none none none solid; border-left-color: rgb(204, 204, 204); border-left-width: 1pt; padding: 0cm 0cm 0cm 6pt; margin: 5pt 0cm 5pt 4.8pt;" class=""><div class=""><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class=""> </span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Question 3:</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" style="font-size: 12pt; font-family: 'Malgun Gothic', sans-serif;" class="">Assuming that the requester KNOWS the latest versionNumber (from some miraculous oracle), I guess she/he can simply ask for (/nytimes/frontpage/v105 | CanBePrefix=false | MustBeFresh=true). Correct?</span><span lang="EN-US" class=""><o:p class=""></o:p></span></div></div></div></blockquote><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class="">Yes, the Interest should have version number if the consumer knows it. <o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div></div><div class=""><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Yours, Junxiao <o:p class=""></o:p></div></div></div></div></div></div><span style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">_______________________________________________</span><br style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Ndn-interest mailing list</span><br style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="mailto:Ndn-interest@lists.cs.ucla.edu" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">Ndn-interest@lists.cs.ucla.edu</a><br style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="http://www.lists.cs.ucla.edu/mailman/listinfo/ndn-interest" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">http://www.lists.cs.ucla.edu/mailman/listinfo/ndn-interest</a></div></blockquote></div><br class=""></body></html>