Forum OpenACS Development: Re: What is the function of the "type_extension_table" attribute of an object_type?

I think "table_name" does what you are referring to. On rereading the doc, I think this is the intention:

Table_name refers to a table which has one row for each object of an object_type. Type_extension_table would contain rows for some of the objects, but not necessarily all, I guess some sort of optional attributes.

I will look into how the built in object tcl API, such as package_instantiate_object, handles it.