The single most important feature I want of a bookmark manager is auto-tagging. Every-time I add a bookmark it should discover the subject it is relevant to and

The single most important feature I want of a bookmark manager is auto-tagging. Every-time I add a bookmark it should discover the subject it is relevant to and add tags automatically (and let me modify them when and I how I see fit, of course). Del.icio.us used to do this back in the days. Pocket premium is the only service I know which can do this today. Can LinkAce do this? I don't mind this being done with help of a 3-rd arty service.