Decision Tree form
Completing the Decision tab (Advanced format)
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C-1069 04-02 Record the if.. then.. logic of the decision tree in the three-column array. These unlabeled columns are known as the comparison, action, and next value columns. 03-01 ZELEK 8/12/02
This help topic describes the advanced format of
the Decision tab. If you encounter a
Decision tab that does not contain
Evaluate Parameter or Evaluate
propertyname see Completing the Decision tab (Basic format).
At runtime, the system evaluates the if portion of
the array, starting at the top row, and continues until it reaches a
Return statement. If the system processes the entire tree
but does not reach a Return statement, it returns the
Otherwise value.
The Evaluate field at the topic identifies the Property value, if any, from the Input tab. When this field is blank, the value is taken from a parameter of the Property-Map-DecisionTree method. The Evaluate field does not appear if this decision tree rule was created in basic mode or if the Allowed to Evaluate Properties? box on the Results tab is not selected.
If the Redirect this Rule? box on
the Results tab is selected, this
circumstance-qualified rule is redirected and this tab
appears blank.
Understanding the
branch structure
Click in a field to display controls for that row or field.
Control |
Action |
| Collapse All |
Click to hide subtree structures, or click a minus sign to hide subtree structures. |
| Expand All |
Click to show all the subtree structures, or click a plus sign to display specific subtrees. |
magnifying glass icon  |
Click to start the Expression Builder. This tool provides prompting and guidance when creating complex expressions involving functions. See Using the Expression Builder. |
pencil icon |
Click to review a property rule (for a field that contains a property reference). |
row buttons and  |
Click to select a row; the background color changes to
peach ( |
| Show Conflicts |
Click to analyze the consistency of the tree. This button
displays a warning icon ( Click the warning icon to orange highlight ( The presence of unreachable portions of the tree does not prevent you from saving the rule. Comparisons involving two properties such as Width > Length are ignored in this analysis. Conflicts are also checked when you save the form, and when you run the Application Preflight check for the application. Conflicts do not prevent the rule from validating or executing, but may indicate that a rule does not work as intended. C-2286 |
| Show Completeness |
Click to automatically add suggested portions of the
decision tree rule that cover additional cases and reduce or
eliminate the situations that fall through to the
Otherwise Return expression. Suggested
additions appear with a light green highlight ( |
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Display Name
Display Label |
When reviewing this tab, you can see a presentation using
either property names or the Short
Description ( |
Modifying branches
with drag and drop operations
Field |
Description |
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if / if value is |
The value can be an expression, such as a literal value
between quotes or a This field is not visible if the action field is set to
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(action) |
Select an action from the selection list. The action you choose determines which branch of this decision tree the system follows at runtime when the condition to its left is reached and evaluates to true. Select a keyword:
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Identify a target based on the action value.
Otherwise, enter a value or expression here that allows evaluation of the decision tree to continue. 03-02 C-344 SR-6421 B-17879 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 one of the following action value keywords:
This input field does not appear when the action value is
Click the pencil icon ( |
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When the system evaluates the decision tree rule at runtime and this row is the source of the results, the system also recomputes the value of the target properties identified in this array. Order is significant. This capability is not available for decision tree rules created in basic mode, or for decision tree rules when the Allowed to Set Take Action? box on the Results tab is not selected. C-1897 |
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| Property |
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| Value |
Enter a value for that property — a constant, property reference, or expression. |
Completing the
Otherwise branch
Field |
Description |
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| Otherwise | |||||
| Return |
Choose
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). Then click the
, 
) next to any parts of the tree that are
unreachable. For example, a branch that extends below
the two mutually contradictory tests (if Width > 100) and
(if Width < 100) is unreachable.
)
).
) and may refer to values
you must modify such as Result or DecisionTreeInputParam.
These additions are only suggestions; you can alter or delete
them. C-1121B-22158
Enter a value for the
current context, or a comparison starting with one of
the six comparison operators <, >, =, !=, >= or
<=.
button to select a pattern that helps you
enter Boolean expressions. The form changes to reflect your
pattern decision. SR-4091 B-21345 apostrophe
arrow to 
, so that it
points down to the indented row. The context for the
)
to hide this array. C-1675
R-17048 OPTIONAL BUG-7286
During backward chaining computations for
Declare Expression rules, if the Otherwise
Return value can be computed, but
properties needed for other parts of the form are
not defined, the Otherwise Return
value is returned as the value of the decision table
rule. (In Process Commander releases before 5.3,
this condition produced an exception that ended
processing.) B-21294 BUG-1155