Queries on rule dependencies

may select

The predicate may select <a rule> returns the ruleflows and rule tasks that might select a given rule.

When you define a ruleflow, you can specify the rules that make up a rule task either explicitly or by using a filtering function. The rule overriding mechanism is also likely to determine how rules are selected for execution at run time (for more information, see Rule overriding).

Example

The following query returns the ruleflows and rule tasks that might select "Rule 1".

Find all ruleflows
   such that each ruleflow may select "Rule 1"

may enable rule

The predicate may enable rule <a rule> returns rules that might make a given rule applicable.

Example

Rule 1:

if the age of the customer is 25 
then set the category of the customer to Bronze ;

Rule 2:

if the category of the customer is Bronze 
then give Champagne to the shopping cart of the customer with message: "Congratulations" ;

Query:

Find all business rules
   such that each business rule may enable "Rule 2" 

This query returns Rule 1 because this rule sets the category of the customer to Bronze and therefore makes the condition of Rule 2 valid.

may disable

The predicate may disable <a rule> returns rules that might make a given rule inapplicable.

Example

Rule 1:

if the age of the customer is 18 
then set the category of the customer to Copper ;

Rule 2:

if the category of the customer is Bronze 
then give Champagne to the shopping cart of the customer with message: "Congratulations" ;

Rule 3:

if the age of the customer equals 25 and the category of the customer is Gold 
then set the category of the customer to Diamond ;

Query:

Find all business rules
   such that each business rule may disable "Rule 2" 

This query returns Rule 1 because if the category of the customer is set to Copper, it cannot be Bronze. The query does not return Rule 3 because the action is to set the category of the customer to Diamond and this rule can be run only from a state where the category is already not Bronze. Therefore Rule 3 does not disable Rule 1.

may be enabled by

The predicate may be enabled by <a rule> returns rules that might be made applicable by a given rule.

Example

Rule 1:

if the age of the customer is 25 
then set the category of the customer to Bronze ;

Rule 2:

if the category of the customer is not Copper 
then set the discount of the shopping cart of the customer to 5;

Rule 3:

if the age of the customer equals 25 and the category of the customer is Bronze 
then set the category of the customer to Diamond ;

Query:

Find all business rules
   such that each business rule may be enabled by "Rule 1" 

This query returns Rule 2 and Rule 3. It returns Rule 2 because if the category of the customer is not Copper, it could be Bronze. It returns Rule 3 because the condition specifies that the category of the customer should be Bronze.

may be disabled by

The predicate may be disabled by <a rule> returns rules that might be made inapplicable by a given rule.

Example

Rule 1:

if the age of the customer is 25 
then set the category of the customer to Bronze ;

Rule 2:

if the age of the customer equals 25 and the category of the customer is Copper
then set the category of the customer to Gold

Query:

Find all business rules
   such that each business rule may be disabled by "Rule 1" 

This query returns Rule 2 because this rule is made inapplicable by Rule 1. In Rule 1, the category of a customer whose age is 25 is set to Bronze, therefore it cannot be Copper.