<div dir="ltr"><br><div class="gmail_extra"><div class="gmail_quote">(Private response)<br><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
Having seen types of Internet service come and go, and likewise <br>
particular hosting instances come and go, it's been apparent that only<br>
data in fairly simple commodity formats tend to persist online more<br>
than a few years: When technology changes for more-sophisticated <br>
data formatting, as it always does, the changeover is lossy.<br></blockquote><div><br></div><div>I think that's quite true, but the list of "fairly simple commodity formats"</div><div>does grow over time, if slowly. Once it was only ASCII plain text, but now</div><div>UTF-8 plain text, any form of SGML including HTML, TeX, and JSON</div><div>count as FSCFs, and any of the above with .gz, .zip, and .tar.gz encodings</div><div>as well. On the image side, GIF, JPEG, and probably PNG count too. PDF</div><div>is not simple, but it's so pervasive in so many domains that it is unlikely to be</div><div>obsoleted.</div><div><br></div><div>A fortiori, this means that at least the bare content of most ODF and OOXML</div><div>documents are accessible, which goes a long way toward being all the commonly</div><div>used document formats in the world. (I have on occasion done a global formatting</div><div>search and replace, for example to replace an unavailable font, by unzipping a</div><div>Microsoft Word .docx document, editing the XML with a plain text editor, and rezipping it.)</div><div><br></div><div>-- </div><div><div>John Cowan <a href="http://vrici.lojban.org/~cowan">http://vrici.lojban.org/~cowan</a> <a href="mailto:cowan@ccil.org">cowan@ccil.org</a></div><div>In politics, obedience and support are the same thing. --Hannah Arendt</div></div><div><br></div></div></div></div>