List of examples:
(in order)

STRUSCA*.* Describes how to use structure scaner.
           Useful when you input is not a hand written but generated
           by another tool.
OPT.RIG    Time measurement in RIGAL
TRAVTREE.RIG Typical traverse of tree. Leaf value change "at
           place"
BALTREE.RIG Building a balanced tree. Sorting.
STACK.RIG   Implementation of stack (size+list)
STACK2.RIG  Another implementation of stack (list only)
