GDX question

> I would like to make a gdx dump of all the sets/paramters/scalars of
> my model, but I do not want any equations or variables in there at
> all.

$version 227
 
  Sets
       i   canning plants   / seattle, san-diego /
       j   markets          / new-york, chicago, topeka / ;
 
  Parameters
 
       a(i)  capacity of plant i in cases
         /    seattle     350
              san-diego   600  /
 
       b(j)  demand at market j in cases
         /    new-york    325
              chicago     300
              topeka      275  / ;
 
  Table d(i,j)  distance in thousands of miles
                    new-york       chicago      topeka
      seattle          2.5           1.7          1.8
      san-diego        2.5           1.8          1.4  ;
 
  Scalar f  freight in dollars per case per thousand miles  /90/ ;
 
  Parameter c(i,j)  transport cost in thousands of dollars per case ;
 
            c(i,j) = f * d(i,j) / 1000 ;
 
  Variables
       x(i,j)  shipment quantities in cases
       z       total transportation costs in thousands of dollars ;
 
  Positive Variable x ;
 
  Equations
       cost        define objective function
       supply(i)   observe supply limit at plant i
       demand(j)   satisfy demand at market j ;
 
  cost ..        z  =e=  sum((i,j), c(i,j)*x(i,j)) ;
 
  supply(i) ..   sum(j, x(i,j))  =l=  a(i) ;
 
  demand(j) ..   sum(i, x(i,j))  =g=  b(j) ;
 
  Model transport /all/ ;
 
  Solve transport using lp minimizing z ;
 
  Display x.l, x.m ;
 
 
* generate include file execute_unload statement
* that write all symbols except variables and
* equations
$onecho > f.awk
BEGIN {
print "execute_unload 'mygdx'" > "temp1.inc"
}
/^ *[0-9]+ / {
  if ($4=="Equ") next;
  if ($4=="Var") next;
  print "," $2 > "temp1.inc"
}
END {
print ";" > "temp1.inc"
}
$offecho
$gdxout temp1
$unload
$gdxout
$call 'gdxdump temp1 symbols > temp1.txt'
$call 'awk -f f.awk temp1.txt'
$include temp1.inc
 
* mygdx.gdx will not contain any variables or equations
execute 'gdxdump mygdx symbols';

Basically at compile time we dump a gdx file temp1.gdx that has all symbols. Then we use an AWK scripts (still at GAMS compile time) to generate an include file temp1.inc that contains an execute_unload statement with all non var/equ symbols to mygdx.gdx. Then we $include this file. Finally for checking we call gdxdump (at execution time) to show all symbols in mygdx.gdx.