... that shortening. The canonical wouldn't be needed if 301 redirect would be used but it's not. The site is configured to use short urls via Direct Alias Pro, so the content is linked by domain.xy/id_nr. This is the way how the content is linked from articles and how are linked the articles itself ...

... it means incorrect configuration and links usage. Joomla itself can't display different links per same article, the link is always same. Direct Alias is not for canonical links, it's for shortening Joomla URLs. Unfortunately, I don't think that we need any canonical options for articles in this ...

That is if you have second domain, if not canonical links are not presented at all - but they should be or they should use 301 redirect.

The solution would be probably same like in previous case. I will try to test it on some new joomla installation.

Hello, would be possible to add override to canonical links creation? At this moment native joomla sef create canonical links according the way you entered the site, this means 2-4 canonical links on the same article. That's of course wrong. It would be enough to add another table with article id an...

Ok - Thank You

One more question - what impact does using Direct Alias (free) have on a website?

Please advice which feature do you mean? K2 has own URLs without IDs.

For now we only plan the feature to use Joomla article alias exclusively for URL:
http://site.com/article-alias
Right now such URL is only possible if an article has own menu item with "article-alias" alias.

Direct Alias Pro can only remove IDs from native Joomla articles component (com_content), it doesn't work with K2.

Both Direct Alias and Direct Alias Pro can remove parent menu items' aliases from menu item URL.

In this example, 'alterbrains-rocks' is an item alias - the item URL is generated from of a K2 > Category Type Menu. For clarification: Direct Alias Pro can only remove the IDs of URLs (categories & item alias) generated from 'Blog Category' ...

If 'alterbrains-rocks' is a menu item - you can edit it and set Alias to 'Direct'