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lines 6-30 of file: at_cascade/get_parent_node.py
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{xrst_begin get_parent_node}

Get Parent Node Name From Option Table
######################################

Prototype
*********
{xrst_literal ,
   # BEGIN_DEF, # END_DEF
   # BEGIN_RETURN,  # END_RETURN
}

database
********
This is a dismod_at database.

parent_node_name
****************
is the *database* option table
*option_value* for the row where *option_name* is ``parent_node_name``.
An assert will be generated if no such *option_name* is found in the
option table.


{xrst_end get_parent_node}