The following was started before Graham's message: 
Thanks for your message about Wolf. I think it's easier to keep the discussion this place, I'm watching for changes. - Yes, I think to link to the unusual, be it a piece or a composer or ..., is a good rule - not a breaking of a rule. Who needs another link to Mozart? If you want to do your readers a favour you might want to send them to List of compositions by Wolfgang Amadeus Mozart#String quartets when they click Mozart, quintets similar ... - When I want to say that a singer appeared in an opera, I mention the part, the composer's last name and link to the opera only. Whoever needs the composer will find him in the first line about the opera. - We recently changed the format of the Bach cantatas to one that you can use without modification, example Erschallet, ihr Lieder, erklinget, ihr Saiten! BWV 172 or Erschallet, ihr Lieder, even St John Passion, after a long discussion on a page that you may want to watch (just click watch in the top line): Wikipedia talk:WikiProject Classical music. Musical greetings,