In this case, it is important to have the unique identifiers. What you could do, is add an extra field, "destroyed" or "unrecognized" for the date that it stopped being a monument, and a field "last updated" to help you check when you checked last (of course you don't show these fields unless they are relevant).
Lodewijk
2011/2/13 Tomasz Ganicz polimerek@gmail.com:
2011/2/13 Maarten Dammers maarten@mdammers.nl:
Hi Hermann or Lars,
Op 13-2-2011 20:21, Hermann Rosemann schreef:
I'm not sure if I'm totally at ease with automatically adding datasets to Wikipedia.
Well ... we talk about 1.5 million datasets in Europe alone, maybe more.
I would say one or maybe a couple of datasets per country.
I'm not totally convinced that these information can be maintained on a more or less current level without automatical support.
Could you please send a concept, how your ideas of generating and maintaining the lists in all Wikiepdia are.
The lists of monuments tend to be quite static. So you have the initial import, every once in a while a couple of monuments are added and maybe sometimes a monument is removed. The Wikipedia communities are probably quite capable of maintaining these lists. For the initial import of the rijksmonumenten we converted the dataset we got into a long wikitext formatted list. The items in this list we're added to Wikipedia. That approach worked.
Well.. not so stable - at least in some countries. For example Polish Heritage Insititute is constantly changing their list. This is just because quite substantial number of new objects are added every year, and also some of them are removed. This is mainly because during communist era many objects were not considered to have a heritage value (old factories, XIX century houses of noblemans etc.) and actually they are, and some objects are allowed to be destroyed (if they have minor importance and are immposible to be moved) or moved to other places due to current construction works (epecially builiding new highways). So, in 2009 Polish list increased from 61000 to 65000... and around 500 objects were allowed to be destroyed or destroyed illegaly.
-- Tomek "Polimerek" Ganicz http://pl.wikimedia.org/wiki/User:Polimerek http://www.ganicz.pl/poli/ http://www.cbmm.lodz.pl/work.php?id=29&title=tomasz-ganicz
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