Show "Protected Internal" in UML?

Question

I am new to UML. I have found these symbols for showing different access modifiers in UML:

• + is for Public
• - is for Private
• # is for Protected
• ~ is for Internal

But in the reference that I consulted, there is no symbol for "Protected Internal."

Would the compound symbol #~ be appropriate?

Answer 1

Unfortunately, there isn't a symbol (or combination of symbols) that means "Protected Internal." That is because the internal keyword is specific to C#, whereas UML was developed as a universal markup language. However, you can come to an agreement for using a particular symbol within your company.

Answer 2

Not a beautiful solution, but you could also (ab)use a stereotype for it which you'd apply to the attributes/methods.