function structure =  SS_eqn(name,bond_number,bonds,direction,cr,args, ...
    structure,filenum);

% Set up globals to count the component inputs and outputs. This relies on
% the named SS (the ports) being in the correct order. Using globals here
% avoids changing the common argument list for all _eqn files for something
% which is only used for named SS components.
global local_u_index
global local_y_index
global at_top_level

% SS_eqn - equations for SS component
% 
%     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
%     %%%%% Model Transformation Tools %%%%%
%     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% 
% Matlab function  SS_eqn
% structure =  SS_eqn(name,bond_number,bonds,direction,cr,args, ...
%    structure,filenum);


% Copyright (c) P.J. Gawthrop, 1996.

			
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
% %% Revision 1.15  1997/12/16 19:16:07  peterg
% %% Added unknown input to the effort part.
% %%
% %% Revision 1.14  1997/12/16 18:25:19  peterg
% %% Added unknown_input attribure to flow -- effort still needs doing
% %%
% %% Revision 1.13  1997/09/18 13:15:15  peterg
% %% Fixed incorrect error message flagging inappropriate flow outputs
% %% -- used to give the effort rather than the flow in the error message.
% %%

inputs = structure(3);
outputs = structure(4);
zero_outputs = structure(5);
unknown_inputs = structure(6);

if strcmp(effort_attribute, 'MTT_port') % Its a named port
if strcmp(effort_attribute, 'MTT_port')&&~at_top_level % It's a named port

% Note: we don't have numbered ports now, so the correct indices are deduced
% by incrementing the two globals: local_u_index and local_y_index
% $$$   % Convert string to number
% $$$   % port_number = abs(flow_attribute)-abs('0');
% $$$   % port_number = str2num(flow_attribute);