Data on node pages

Is there a list somewhere of what data exactly is available on node templates?

Things I would like to know in particular:

  • Am I on a taxonomy?
  • What is the taxonomy?
  • What is the term?

Are these available on node pages, or is it possible to determine them?

@natefinch posted a tip on using printf in a template to show what is available. Would that give you the information that you’re after?