Keys and extra parameters are used to pass on information to an ITP Model. You can - for example - use the key or extra parameters to identify the customer for whom you want to create a policy or an invoice. The ITP Model can then use the identifying information to retrieve the full customer name and address.
Keys and extras are passed to ITPRun as strings of values divided by semicolons (;). The order in which they are passed must be the same as the order in which they are expected in the model.
It is possible to specify an empty parameter by following a semicolon with another semicolon (;;).