Job Shared Variable

A Job Shared Variable shared configuration resource allows you to
store data for use by each process instance. A copy of the variable
is created for each new process instance. This resource is useful for
passing data to and from sub-processes without creating an input
or output schema for the called process.
You can use the Get Shared Variable and Set Shared Variable activities to access
the data instead of mapping data to a called processes input or output schemas.
New process instances receive a copy of the variable, so data cannot be shared
across process instances. Therefore, if a called process has the Spawn
configuration field checked, a new process instance is created and the process
instance receives a new copy of the job shared variable.