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Flow variables
Flow variables provide a means of passing information throughout a flow instance without requiring that the information to be passed through data links. flow variables are name-value pairs that persist, unless deleted.

Flow variables
Flow variables provide a means of passing information throughout a flow instance without requiring that the information to be passed through data links. flow variables are name-value pairs that persist, unless deleted.
- Flow variables locations
  Flow variables can be specified at different locations.
- Flow variables scope
  Under Flow Engine context, all flow variables (both custom and special) defined for the flow instance, go out of scope when the flow instance completes execution. It does not affect the flow variables of the other instance.
- Thread local flow variables
  A 'thread local flow variable' is a special variable, in that each thread running under a flow instance gets a copy of the flow variable when referenced. Each thread then works on its own copy during flow execution. Any action (get, set, delete, increment, decrement, resolve), on the thread local flow variable, is performed on the copy of the flow variable associated with that thread.

Flow variables

Flow variables provide a means of passing information throughout a flow instance without requiring that the information to be passed through data links. flow variables are name-value pairs that persist, unless deleted.

Flow variable names cannot start and end with an underscore (_). a variable that starts and ends with an underscore is considered as a reserved, internal special variable. It cannot be set or manipulated, from a user defined node of a flow. Flow variable names are case-sensitive, and associate a value in test format. Flow variables fall either under custom, or special categories.