On 2013–02–08 Hans Hagen wrote:

> default: texmftree
> local  : relative to source
> global : path list
> 
> these can be combined

How to include MP graphics sitting in a dedicated directory, e.g.
“graphs”?

%% file: graphs/foo.mp
beginfig(1);
  fill unitsquare scaled 2cm withcolor red;
endfig;

%% file: test.tex
\setupexternalfigures
  [directory=graphs,
   %% location=???,
  ]

\startMPrun
  %% including the path works
  %% input graphs/foo.mp;

  input foo.mp;
\stopMPrun

\starttext
  \externalfigure [mprun.1]
\stoptext

Marco