It's in their style guide. https://docs.racket-lang.org/style/Textual_Matters.html#%28part._names%29 https://docs.racket-lang.org/style/Textual_Matters.html#%28

It's in their style guide. https://docs.racket-lang.org/style/Textual_Matters.html#%28part._names%29 https://docs.racket-lang.org/style/Textual_Matters.html#%28p... something% is a class. something<%> is an interface