<div dir="ltr">Semi-piling on here, but there are limits to the current 8601 standard, which I believe is due for an update in the near future.<div><br></div><div>Please see info here about the Extended Date Time Format:</div><div><a href="http://www.loc.gov/standards/datetime/">http://www.loc.gov/standards/datetime/</a><br></div><div><a href="https://mapzen.com/blog/tackling-space-and-time-in-whosonfirst/">https://mapzen.com/blog/tackling-space-and-time-in-whosonfirst/</a><br></div><div><br></div><div>I'm not really sure why ISO shut down the LoC's discussion of EDTF, but I'm hopeful we'll be supporting whatever standards emerge, as there's clear need for improvement.</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, May 7, 2018 at 3:42 AM, SK53 <span dir="ltr"><<a href="mailto:sk53.osm@gmail.com" target="_blank">sk53.osm@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Karl Grossner has certainly done at least one thing (<a href="http://dh.stanford.edu/topotime/about.html#about" target="_blank">Topotime</a>) along these lines. <br><br></div>My own views were summarised ages ago in <a href="http://sk53-osm.blogspot.co.uk/2013/08/history-workshop-at-sotmbaltics.html" target="_blank">my blog post</a> about Susanna's workshop at SotM-Baltics: i.e. multiple types of start and end dates expressing different degrees of certainty, ranges are a slightly different syntactic way of presenting this (one tag not two). Note that individual dates are likely to be fuzzy too (Tudor, in the reign of Queen Elizabeth, inter-war, 1970s, 1970, May 1971 etc) and it may be desirable to represent the fuzziness in documentary sources explicitly. One of the things I've noticed when even adding fairly small things to OHM is that to be really useful to others one really needs to store useful metadata about sources.<br><br></div>Jerry<br></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On 6 May 2018 at 23:57, Dan Vanderkam <span dir="ltr"><<a href="mailto:danvdk@gmail.com" target="_blank">danvdk@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">As an FYI, ISO-8601 does specify a standard format for date and time intervals. It uses a forward slash and allows some shorthands:<div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">- 1980-07-01/1983-05-01</span><br></div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">- 1980-07-01/07 (same as 1980-07-01/1980-07-07)</span></div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br></span></div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Not the prettiest, but it is a standard.</span></div><div><a href="https://en.wikipedia.org/wiki/ISO_8601#Time_intervals" target="_blank">https://en.wikipedia.org/wiki/<wbr>ISO_8601#Time_intervals</a></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, May 6, 2018 at 3:28 PM, Tim Waters <span dir="ltr"><<a href="mailto:chippy2005@gmail.com" target="_blank">chippy2005@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><a href="https://wiki.openstreetmap.org/wiki/Key:start_date#Approximations" target="_blank">https://wiki.openstreetmap.org<wbr>/wiki/Key:start_date#Approxima<wbr>tions</a><br><br></div>gives a number of such approximations with<br><br></div>1980-07-01..1983-05-01 as a suggested value.<br><br></div>I seem to recall coming across a kind of bibliographic standard of all the ways that dates can be encoded to capture fuzzyness, if I come across it I'll add the info the page<span class="m_1797263762177651401m_-728433342913467567HOEnZb"><font color="#888888"><br><br></font></span></div><span class="m_1797263762177651401m_-728433342913467567HOEnZb"><font color="#888888">Tim<br></font></span></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="m_1797263762177651401m_-728433342913467567h5">On 6 May 2018 at 11:19, PauLL170 <span dir="ltr"><<a href="mailto:bilbo.beuthel@gmail.com" target="_blank">bilbo.beuthel@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="m_1797263762177651401m_-728433342913467567h5"><div dir="ltr"><div><div>Hi,<br><br></div>i'm already mapping Germersheim and a bit of Trier :) . Regarding start_date and end_date I was talking about the following: E. g. if you have a photo from 1983-05-01 with a certain building and one from 1980-07-01 without it, you can set as start_date 1980-07-01..1983-05-01. In my opinion it is important that the time slider recognizes this form, because it is often the case. Generally, we will have to think about how to render this object in this period, in which the building possibly already have existed. But for now, I just want to suggest that the time slider recognizes this form in general, as far as it is doable. As a first version I imagine a check box: "show doubtful objects". If it is activiated, the "start_date" technically is set 1980-07-01 and if not, it is set 1983-05-01.<br><br></div>Best regards<br>Paul<br></div>
<br></div></div><span>______________________________<wbr>_________________<br>
Historic mailing list<br>
<a href="mailto:Historic@openstreetmap.org" target="_blank">Historic@openstreetmap.org</a><br>
<a href="https://lists.openstreetmap.org/listinfo/historic" rel="noreferrer" target="_blank">https://lists.openstreetmap.or<wbr>g/listinfo/historic</a><br>
<br></span></blockquote></div><br></div>
<br>______________________________<wbr>_________________<br>
Historic mailing list<br>
<a href="mailto:Historic@openstreetmap.org" target="_blank">Historic@openstreetmap.org</a><br>
<a href="https://lists.openstreetmap.org/listinfo/historic" rel="noreferrer" target="_blank">https://lists.openstreetmap.or<wbr>g/listinfo/historic</a><br>
<br></blockquote></div><br></div>
<br>______________________________<wbr>_________________<br>
Historic mailing list<br>
<a href="mailto:Historic@openstreetmap.org" target="_blank">Historic@openstreetmap.org</a><br>
<a href="https://lists.openstreetmap.org/listinfo/historic" rel="noreferrer" target="_blank">https://lists.openstreetmap.or<wbr>g/listinfo/historic</a><br>
<br></blockquote></div><br></div>
</div></div><br>______________________________<wbr>_________________<br>
Historic mailing list<br>
<a href="mailto:Historic@openstreetmap.org">Historic@openstreetmap.org</a><br>
<a href="https://lists.openstreetmap.org/listinfo/historic" rel="noreferrer" target="_blank">https://lists.openstreetmap.<wbr>org/listinfo/historic</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><font size="1">Jeff Meyer</font></div><div dir="ltr"><font size="1">206-676-2347<br></font><div><span style="font-size:x-small">osm: </span><a href="http://wiki.openstreetmap.org/wiki/Open_Historical_Map" style="font-size:x-small" target="_blank">Open Historical Map (OHM)</a><span style="font-size:x-small"> / </span><a href="http://www.openstreetmap.org/user/jeffmeyer" style="font-size:x-small" target="_blank">my OSM user page</a><br></div><div><div><font size="1">t: @OpenHistMap </font></div><div></div><div><br></div><div><br></div><div><font size="1"><br></font><br></div></div></div></div></div></div></div>
</div>