HP Intelligent Management Center Standard Software Platform - Manual (Page 685)

Orders Table Orders Table Customer Table
Order Amount Order ID Customer ID
7911.80 19 62
19766.20 28 63
12763.95 32 63
8233.50 14 64
65
66
10320.87 25
Not Enforced
When you select this option, the link you've created is used only if it's explicitly
required by the Select statement. Your users can create reports based on
the selected tables without restriction (that is, without enforcement based on
other tables). This is the default option.
Enforced From
When you select this option, if the to table for the link is used, the link is
enforced. For example, if you create a link from TableA to TableB using
Enforce From and select only a field from TableB, the Select statement will
Crystal Reports 2008 SP3 User's Guide 685
25 Understanding Databases
Linking tables