Is it possible to tag, private message (pm) or notify another user? [closed]

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@Mike Kaganski: in an ancient post, a trick was given to resolve duplicates or prefix ambiguity but I don't remember it. @igorlius tries to ring an Antonio Faccioli (user 29553 ) but there exists also an Antonio straight (user 2768) which seems to take precedence over the former. I tried to tweak the encoding with <a href="en/users/29553/…"> but I still get reference to user 2768. See comment in question 253483.

@ajlittoz: IIUC, there's no workaround for the site's problems with notifying wrong people. Or had you discovered the correct syntax? I wasn't able to figure from the discussion what was the trick?

Basically, I looked at the generated HTML and tried variants. The problem is the space in the user name. When you write @user, this translates to <a href="en/users/123/user">@user</a>". The difficulty appears when a full name is used like Mike Kaganski. The technical username becomes mike-kaganski, i.e. all lowercase and space replaced by hyphen. But using it with a relative link does not work. You must code the link as absolute. And this is not sufficient. Typing @Mike Kaganski as the element content will point to user Mike despite the absolute link. The culprit is the space.

The solution is:

<a href="https://ask.libreoffice.org/en/users/123/first-name">@first&nbsp;name</a>

Hovering over it points to the right user.

However I don't know if this direct HTML triggers the notification system.

However I don't know if this direct HTML triggers the notification system

As far as I understand, it does not. The hyperlink just creates a visible link; while the notification is created by the engine when parsing the @ + username part - which would be independent form the outer hyperlink iiuc.