In a previous post I wrote about so-called Static Entities. I defined Static Entities as,
[S]tatuses and types […] usually established at the beginning of the design as core indicators of business logic; implemented as immutables and not managed by the client through any kind of [user] interface. In other words, they are hard-coded. However, we do still want to store these statuses and types in our database to make our queries more efficient. This compels us to implement these as [E]ntities as opposed to [E]nums.