Completing the Decision tab (Basic format)
Record the
if.. then..
logic of the decision tree in this array,
which has three columns. The unlabeled columns are known as the comparison, action, and next
value columns.
This help topic describes the basic format of the Decision tab. If you encounter a Decision tab that contains an Evaluate Parameter or Evaluate property name, see Completing the Decision tab (Advanced format).
At run time, the system evaluates the if portion of the array, starting at the top row,
and continues as described here until it reaches a
Return
statement. If the
system processes all rows but does not reach a
Return
statement, it returns
the
Otherwise
value.
If the Redirect this Rule? check box on the Results tab is selected, this circumstance-qualified rule is redirected and this tab is blank.
Understanding the rows
Each text box can contain a value, a comparison operation for two values, followed by an outcome. The comparison can be between two properties or between a property and a constant value.
To make controls for a row or field visible, click that field :
- To hide subtree structures, click Collapse All. To hide specific subtree structures, click the minus sign.
- To show all subtree structures, click Expand All. To display specific subtrees, click the plus sign
- To review a property for a field that contains a property reference, click the Open icon.
- To append or delete a row, select a row and then click the Add or Delete icon, respectively.
| Field | Description |
| if / if value is |
Enter a comparison by using one of the six comparison operators: <, >,
=, !=, >= or <=.
The value can be a constant or a
Otherwise, this field is not visible.
|
| (action) |
Select an action from the selection list. The action that you choose
determines which branch of this decision tree the system follows at run time when
the condition to its left is reached and evaluates to true. Select a keyword:
|
| (next value) |
Identify a target based on the action value.
If you selected
Otherwise, enter a value or expression here that allows the evaluation of the decision tree to continue. You can reference a property on any page, but be sure to enter any page you reference on the Pages & Classes tab. Enter a value that depends on the action value keyword:
This input field is not displayed when the action value is
To open a referenced decision tree, map value, or decision table, click the Open icon. |
| Expand icon |
Click to access an optional array of properties and values. To hide this
array, click the
Collapse
icon . This choice might not be
present in all cases, depending on settings on the
Results
tab.
When the decision tree evaluates and this row is the source of the results, the system also recomputes the value of the target properties that are identified in this array. Order is significant. |
| Property | Optional. Identify a property reference to be set. |
| Value | Enter a value for that property. |
| Otherwise | |
| Return |
Optional. Enter an expression defining a value to return when the decision
tree evaluation does not return another value. When the Allowed Results list on the
Results
tab is not blank, this field is required and
limited to one of the constant values listed on that tab.
If this field is blank and no other return value is computed, the system returns the null value. |
arrow to 
to point
down to that indented row. The context for the continue statement is the same
as for the current statement. Previous topic Completing the Decision tab (Advanced format) Next topic Completing the Pages & Classes tab