Article Figure 1 Figure 2 Figure 3 Listing 1
Listing 2 Listing 3 Table 1 Table 2 jul2005.tar

Listing 1 ER diagram

graph G
{
         rotate = 90;

         B_ISBN[label="ISBN"];
         B_Title[label="Title"];
         B_Price[label="Price"];
         O_id[label="id"];
         O_TC[label="Total Cost"];
         O_DC[label="Delivery Cost"];

         node[shape=rectangle];
         Book[label="Book"];
         Order[label="Order"];

         BO[label="Book Order relation", shape=diamond];

         B_ISBN -- Book[len=1.2];
         B_Title -- Book[len=1.2];
         B_Price -- Book[len=1.2];

         O_id -- Order[len=1.2];
         O_TC -- Order[len=1.2];
         O_DC -- Order[len=1.2];

         Book -- BO[label = "1", len=2];
         Order -- BO[label = "m", len=2];
}