Forum:SH Archive/"First mentioned" vs "First appearance"

What is the policy on the use of a First appearance tag versus a First mentioned tag? The example that made me think of this was Corellia, which is first mentioned in the ANH novel, but its technical first appearance is in Marvel Star Wars #100. But, whatever the example is, can both the tags be used in the same article, or is that not really the point of them? I suppose that could get confusing, especially on any very long articles. --JMM (talk) 20:10, October 14, 2013 (UTC)