[NTG-context] Referring to a numbered figure in text.

Using MKIV and the \placefigure command how do I a. define a reference term in \placefigure command b. refer to that term in my text. -- John Culleton Wexford Press Free list of books for self-publishers: http://wexfordpress.net/shortlist.html PDF e-book: "Create Book Covers with Scribus" available at http://www.booklocker.com/books/4055.html