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Denmark-Norway and Sweden-Norway should split for the template to link properly
The template shows the alternative "Sweden-Norway" in 1815-1905. This is a problem, because both Sweden and Norway has their own separate year-articles, and with this name on the template, it does not lead to articles such as 1861 in Sweden and 1861 in Norway and so forth. Separate year-articles for Sweden and Norway in 1815-1905 are justified, because though they were in union with each other, they did have their own government and administration and laws.
A similar problem is the one with "Denmark-Norway", which causes the template not to link any of Denmark's or Norway's Year-articles before 1814.
While Norway was indeed a Danish province for centuries until 1814, they still have separate year-articles here, and as they are different nations now, that is as justified as the separate year-articles of Scotland and Ireland and Wales, which has their own Year-articles despite them being regarded as part of England/Great Britain for centuries.
Perhaps there are other examples, but of those I am aware, Denmark, Sweden and Norway have their own year-articles and the Year-template should link to those. I therefore think that for the template to work for those, the "Denmark-Norway" (until 1814) and the "Sweden-Norway" (1815-1905) should be split to Denmark, Norway and Sweden. Unfortunately, I do not have the skills to do that.
Can any one perform this? --Aciram (talk) 23:16, 25 September 2015 (UTC)
I've split Sweden and Norway into its constituent parts, because as a personal union the countries don't seem to have fully united into a single country, unlike Denmark and Norway. For the latter I added Denmark and Norway as a subgroup of Denmark–Norway (i.e. in brackets after it). SiBr4 (talk) 09:09, 26 September 2015 (UTC)
I agree with your decision. Problem is solved then. Thank you very much! --Aciram (talk) 13:04, 26 September 2015 (UTC)
Perhaps Finland (a Swedish province in until 1809 and then a Russian province until 1917) should be given the same solution as Denmark-Finland, if the years prior to 1917 here: List of years in Finland are ever given articles? --Aciram (talk) 14:16, 26 September 2015 (UTC)
Since the respective year articles for Finland don't exist, and those for the then parent country Sweden do (those for Russia not, however), there is no practical problem that's solved by adding constituent parts in brackets, unlike with Denmark–Norway. Having virtually no experience with year articles apart from creating this template, I can't say whether or not pre-independence year articles for Finland will/should be created. SiBr4 (talk) 14:52, 27 September 2015 (UTC)
I saw the same thing. The first · is the one output normally after San Marino. The second one is output after the second-level list items under Soviet Union. There appears to be a problem when neither the top-level item, nor the second-level items exist. But I don't currently know how to fix this. --David Edgar (talk) 09:25, 10 February 2017 (UTC)