Currently if a mod adds a whole bunch of new types, a Server Admin is required to edit the core types.xml file to add all the additional items, which often results in xml parse errors, as human error factors in heavily with large chunks of text.
If we could use the include tag that is used in the mapgroupcluster.xml files, it would allow the modder to provide a correctly formatted file, that the server owner simply needs to add to the db folder, and a single line to add to the types.xml file.
This would solve so many issues.
I'm aware that this is not intended as the final system, but it's what we have to work with for now.