"wikipedia page title should have first letter capitalized" is not universally true

[mkoniecz]

see https://josm.openstreetmap.de/browser/josm/trunk/resources/data/validator/wikipedia.mapcss#L79

see ​https://www.openstreetmap.org/node/13768278206 and ​https://de.wikipedia.org/wiki/dm-drogerie_markt - note {{SEITENTITEL:dm-drogerie markt}} in Wikicode

(this should be brand:wikipedia but that is a different issue)

originally reported as ​https://github.com/osmose-qa/osmose-backend/issues/2785

[stoecker]

> wget https://de.wikipedia.org/wiki/dm-drogerie_markt
--2026-07-27 18:40:44--  https://de.wikipedia.org/wiki/dm-drogerie_markt
Resolving de.wikipedia.org (de.wikipedia.org)... 185.15.59.224, 2a02:ec80:300:ed1a::1
Connecting to de.wikipedia.org (de.wikipedia.org)|185.15.59.224|:443... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://de.wikipedia.org/wiki/Dm-drogerie_markt [following]
--2026-07-27 18:40:44--  https://de.wikipedia.org/wiki/Dm-drogerie_markt
Reusing existing connection to de.wikipedia.org:443.
HTTP request sent, awaiting response... 200 OK

This page redirects to ​https://de.wikipedia.org/wiki/Dm-drogerie_markt, which is upper-case. If lower-case is possible, your example isn't valid for such an entry. You also see that in the browser when you look in the URL field.

Do you have another example which does not redirect?

[mkoniecz]

yes, the URL at ​https://de.wikipedia.org/wiki/Dm-drogerie_markt has uppercase first letter

but human-visible wiki page title does NOT have uppercase first letter in the same way as "drogerie" and "markt" are separated by _ in URL and by space in human-visible wiki page title

the same goes for more complex characters in titles and some other cases where URL and title mismatch for technical reasons

[stoecker]

From a technical point the page title is "Dm-drogerie markt" which is manually changed in wikipedia. But that cannot be known to any software before it downloads the page. So for a software to correctly link the page it needs to use the real title, not a manual rework using SEITENTITEL. So the warning is valid.

[anonymous]

Software can rely redirect being in place

And wikikipedia tag is for human page title, not for URL.

I guess I can start forum discussion to check whether my opinion is widely shared or abberation?