Process Variables
Process variables are similar to concept properties in TIBCO BusinessEvents. Process variables are used to hold data that enters the process during its execution at run time. Using an XPath mapper you can map data from simple events to process variables and from process variables to resources such as other simple events, rules, and so on.
You can define process variables of these types: String, int, long, double, Boolean, DateTime, and Concept. Variables can be flagged as Multiple, that is, arrays.
If you want to rename the process variables, then right click the process variable and select Rename. The variable name is updated everywhere in the process.
When you select Concept as the process variable type, you select a concept from the project ontology. This concept behaves like a contained concept, with respect to the process, which behaves like the containing concept.