You will find the corresponding automation map for DxD on SupportNet Product Docs for the EE2007.5 release. The pdf is called DxDesigner Automation Data Model. Even if you are on an earlier release, the data model should be helpful.
We've also posted the PCB Automation Data Model (mgcpcbautomationoverview.pdf) on SupportNet Product Docs.
So I can find the PCB Automation Reference guide but Im not seeing the DxD Automation Guide in the location you are describing...