Rule Components

Rules are used to identify features based on sets of logical expressions. They can be created and managed from the Rules Workspace.

They are made from a series of component nodes, arranged in a hierarchy of Parent and Child Nodes. The basic component types that rules use are:

Predicates	Predicates are a high-level logical test that defines the syntax for both Rules and Actions. It defines the sequence in which tests are performed.
Operations	Most Operations are Action Components. The Execute then Check Predicate is the exception, allowing all Operation types except for the Object and Report Operations.
Relations	Relationships compare two Values and return a result of true or false.
Values	Values are either a constant, a reference to objects, or a calculation that is used in a Predicate.

In the following image, the purple "Rule For" node is the root Rule node, the green "Check That" is the Predicate node, the yellow nodes with the "1" in them are Values, and the blue "Equals" node is the Relation.

The order of the component nodes defines the order each is acted on. The exception is "IF…THEN…ELSE", where the result in the initial Predicate determines which of the other two Predicates is run.

The image below shows that, "Check That { 1 Equals 1 }" will always go before the other "Check That" node.

Clicking an empty (gray) component node will give you a choice of components to add from the correct type.

Clicking a component will allow you to configure the parameters for the component.