[Gnumed-devel] more stuff to play with

[sjtan]

in test-area/sjtan   testschema5.py displays single rooted trees from 
schema information in postgres , by chasing foreign keys;
testobj1.py uses this so "instances" of  trees can be browsed, e.g.  
xlnk_identity,3  where 3 is the primary
key of xlnk_identity.  It doesn't handle multiple field foreign keys, 
and foreign keys not defined in pg_constraints ,
such as xlnk_identity to identity.