Using Clause
The using
clause specifies one or more event types to subscribe to in the pattern, and an alias for each. One says that the pattern subscribes to these events.
Use and
to separate each event type.
Examples
using /Ontology/EventA as a and /Ontology/EventB as b using "/My Ontology/My Patterns/EventA" as a and "/My Ontology/My Patterns/EventB" as b