Defining AccessRights in the XML configuration file

I am programmatically defining the address space by creating an XML file. The XML file expects a numeric value for AccessRights whereas the CSV definition used text (READ_WRITE, etc).
Where can I find info on defining AccessRights in 7.6?

Documentation is coming, in the meantime:

Read_Only = 0
Read_Write = 1
Custom = 2

Just a side note: There was an issue importing custom permissions in xml in 7.6.0, it’s been fixed for 7.6.1.