Hi apologies about the late response. No, when I say transform map you have that and robust transformers where  you receive the raw data from the 3rd party app and servicenow will convert that into a CMDB record. However from what I can see it looks like its workflow based and guides you through the process. Check out the install and configuration guide which should help you through it.
SNOW Installation Guide 

Please mark as helpful or if its resolved the issue, CORRECT!