Tag types on 3dbooru are similar to Danbooru but extended. Tag-types can be set during upload by prefixing the full tag type or a shortcut in front of a tag. For example:
model:namada
mod:namada
Once a tag type has been set subsequent uploads will not require it (i.e. once namada is set to tag type model all future uploads with the tag namada will also be model tag types). The current tag types and their colors: