<div dir="ltr"><div>Late to this as ever. I think Robert summarised all the important things I wanted to say, so just a few additions:</div><div><br></div><div>* Use cases: I imagine the primary use cases will be related to individual lists, so ensuring that they are readily discoverable at the list level helps.</div><div>* Using an Operator tag as effectively part of the primary key has problems in that it's easy to make typos or to forget what the canonical form of the operator name is in osm (check out Weatherspoons, for instance).</div><div>* Other heritage lists. There are a considerable number of perfectly valuable non-statutory heritage lists. Off the top of my head those of Camra (Heritage Pubs), 20th Century Society (active in achieving the recent listing of Dunelm House), local civic societies, <a href="http://www.rhrp.org.uk/surveystatus.htm">railway heritage groups</a>, and local authorities (which may retain lists which will be considered for planning purposes).</div><div>* List ownership changes, as mentioned. The earliest mention of UK listed status I'm familiar with is in volumes of the Pevsner series abbreviated as MHLG, and even in the history of OSM we've seen English Heritage transform to Heritage England, and similar changes in many natural heritage bodies.</div><div><br></div><div>I think including a country code in the key is probably useful to provide context & avoid potential collisions in use of initials.</div><div><br></div><div>Jerry<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 24 Jul 2021 at 12:08, Mark Goodge <<a href="mailto:mark@good-stuff.co.uk">mark@good-stuff.co.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
<br>
On 24/07/2021 00:15, Robert Whittaker (OSM lists) wrote:<br>
> <br>
> There's also the potential for more than one organisation to assign a<br>
> heritage reference number to the same object. In addition to a<br>
> national body, there may be local or international bodies that<br>
> catalogue heritage assets. It's also possible that some assets that<br>
> lie near or across national boundaries will be catalogued by more than<br>
> one national body.<br>
<br>
There certainly are cross-border structures that are listed by more than <br>
one heritage authority. Chirk aqueduct and Chirk viaduct, for example, <br>
are both listed by both Historic England and Cadw.<br>
<br>
<a href="https://britishlistedbuildings.co.uk/listed-buildings-map?loc=18,52.9280178,-3.0621707" rel="noreferrer" target="_blank">https://britishlistedbuildings.co.uk/listed-buildings-map?loc=18,52.9280178,-3.0621707</a><br>
<br>
Mark<br>
<br>
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</blockquote></div>