<table>
      <tr>
        <td></td>
        <td class="example">
          <pre>
       mtt help representations
       mtt help components
       mtt help examples 
       mtt help crs
       mtt help representations &lt;match_string&gt;
       mtt help components &lt;match_string&gt;
       mtt help examples  &lt;match_string&gt;
       mtt help crs &lt;match_string&gt;
       mtt help &lt;component_or_example_or_CR_name&gt;
</pre

    </table>
    where n is an integer (unique within the label file). For example
    <table>
      <tr>
        <td></td>
        <td class="example">
          <pre>
%ALIAS  $a1  lin           
</pre
          >
        </td>
      </tr>
    </table>
    assigns the symbolic parameter to be lin. This parameter <code>$1</code> can
    then be used for passing a diofferent cr to the component (see section

    <!--docid::SEC96::-->
    <p>Component aliases are of the form</p>
    <table>
      <tr>
        <td></td>
        <td class="example">
          <pre>
%ALIAS Component_name   Component_location       
</pre
          >
        </td>
      </tr>
    </table>
    <p>An example appears in the following label file fragment</p>
    <table>

    <table>
      <tr>
        <td></td>
        <td class="example">
          <pre>
FOR ALL rho,g,vol,h,topt,bott,flowin,press
LET tktf2(rho,g,vol,h,topt,bott,effort,2,press,effort,1)
        = tank(rho,g,vol,h,topt,bott,press);      
</pre
          >
        </td>
      </tr>
    </table>
    Assuming that `tank' is not defined in a reduce file, MTT will leave it
    unresolved when generating m or c code.

        <td></td>
        <td class="example">
          <pre>
function p = tank (rho,g,vol,h,topt,bott,press)

  ## usage:  p = tank (vol,h,topt,bott,press)
  ##
  ## 

   val = press; zt = topt; zb = bott; 
   zval = 0.5*(abs(zb+(zt-zb)*val-h)+(zb+(zt-zb)*val-h));

   p = rho*g*zval + 0.5*(1+tanh((press-0.98)*500))*100000;

endfunction
</pre
          >

    Following the example of the previous section, the unresolved CR `tank' can
    be expressed in c++ code. For example:
    <table>
      <tr>
        <td></td>
        <td class="example">
          <pre>
inline double tank(const double rho, 
                   const double g, 
                   const double vol, 
                   const double h, 
                   const double topt, 
                   const double bott, 
                   const double press)


  /*  ## usage:  p = tank (vol,h,topt,bott,press)
    ##
    ##
  */

    <table>
      <tr>
        <td></td>
        <td class="example">
          <pre>
# Makefile for the Two link GMV example

all: msdP_tf.m TwoLinkP_obs.m TwoLinkP_sm.m twolinkp_sm.m TwoLinkGMV_numpar.m 

msdP_tf.m: msdP_abg.fig 
        mtt -q msdP tf m

TwoLinkP_obs.m: TwoLinkP_abg.fig TwoLinkP_lbl.txt
        mtt -q TwoLinkP obs m

TwoLinkP_sm.m: TwoLinkP_abg.fig TwoLinkP_lbl.txt
        mtt -q TwoLinkP sm m

B = 10

C = 1

D = 0

octave> 
</pre
          >
        </td>
      </tr>
    </table>
    generates the data structure rc corresponding the the bond graph of the
    system called `rc'. The following octave commands then generate the step

      installed, this may be done with the command
    </p>
    <table>
      <tr>
        <td></td>
        <td class="example">
          <pre>
  mtt sys sfun mexglx 
</pre
          >
        </td>
      </tr>
    </table>
    <p>
      which will generated the four .mex files and the .mdl file. In this case,