Is there a way to output several MetaPost PDF graphics from a single
ConTeXt source file.  For example,

\startMPpage
  draw fullcircle scaled 72;
\stopMPpage

\startMPpage
  draw unitsquare scaled 72;
\stopMPpage

and have a separate output PDF generated for each MPpage?  It seems that
this ConTeXt code generates a single PDF which contains only the first
graphic.  I would like to have either

1) two separate PDF's with each containing their own graphic
2) a single two page PDF where each page corresponds to the appropriate
graphic.

Of course, the "holy grail" would be to be able to "compile" a MetaPost
source file with ConTeXt.

Troy Henderson