3.3.3.2 Transaction Object Initialization
A transaction object MUST be initialized by using all the initialization steps, as specified in [MS-DTCO] section 3.2.3.1. Also, the TIP interoperability provider MUST initialize each new transaction object that it creates by using the following default value:
The RemoteTipTransactionUrl field MUST default to an empty string.
The OurTipTxId field MUST default to NULL.