User blog comment:DaNASCAT/Template Types: A Smarter Categorization System/@comment-25653892-20151122175315/@comment-26228779-20151122225756

They can easily make it expandable. They make the template type list an array of strings for both name and description. Then, the type within the page is dictated by a single tiny integer variable (4 bytes in the metadata). They already have tobe doing something like this in order to create it, so giving each wiki a template type list that is editable would work just fine.