Actions are operations that are batch in nature. For example, the "create", "update", "delete", and other operations allow changes to up-to 50 objects at a time. The "query" operation will return up-to 2000 result records back at a time, before requiring additional pages of data to be returned via a subsequent "queryMore" operation.
The default WSDL version for Actions is 79. If you want to change the WSDL version, set the X-Zuora-WSDL-Version header. To find out in which WSDL version a particular object or field was introduced, see Zuora SOAP API Version History.
Note: Actions do not support the Invoice Settlement feature. This feature includes Unapplied Payments, Credit and Debit Memo, and Invoice Item Settlement. Actions also do not support the Orders feature.