Schilling, Tom, 14/04/20 14:30:
So the question arises if a usage of pageID would not be a better solution in context of linked open data?
Yes, it would be. We use it already for permalinks in Wikimedia Commons attribution strings and in Meta-Wiki pages.
Are there any concerns why this procedure could be a particularily bad idea? Is the pageID in this case a persistent identifier for the page on wikipedia?
It's not completely persistent, it can be lost. It's relatively rare though, and those cases may not matter to you. https://www.mediawiki.org/wiki/Manual:Page_table#page_id
I don't recommend it, but a more permanent ID is the oldid or rev_id, unless that revision is deleted. One advantage would be that it records what version of the page you consulted; later versions could change the topic of the page. It can also be used for some forms of links to the *page* without further redirection, for instance the page history: https://www.mediawiki.org/?oldid=3777687&action=history
Federico