Understanding different WSO2 ESB Scopes 

Scopes:

1. Synapse scope

When the scope of a property mediator is synapse, its value is available throughout both the in sequence and the out sequence

2. axis2 scope

When the scope of a property mediator is axis2, its value is available only throughout the sequence for which the property is defined (e.g., if you add the property to an in sequence, its value will be available only throughout the in sequence).