Explicit element definition

Explicit element definition involves the types of statements as above composed of

set

name of the set

optional explanatory text

/

element names followed by optional explanatory text.

between element names either a comma or a carriage return

/.

In element definition, one may cause multiple elements to be defined in sequence by using notation such as r1*r4 which causes definition of r1,r2,r3,r4.  One can also place the number in other positions using for example 1u*10u which would define 1u, 2u, 3u etc. up to 10u.  Additionally one may assign members to a set in decreasing order.

Examples:

(sets.gms)

SETs rj                                         /x1,"x2 item",'x3*case'/
     ri                                         /r1 ,r2,r4*r10, 1a*200a/;

SET         mPROCESS                      PROCESSES           /X1,X2,X3/;

SET         mcommodities                Commodities         /    corn  in bushels

                                                    Wheat in metric tons

                                                    milk  in pounds/ ;

 SET years                        items in decreasing order

                                                                 /bc2000*bc1,rr2009*rr0/;

 SET years2                        decreasing        /"-20"*"-1"/;