 <p>The code you are referring to is proprietary to your application's code. There is no standard for what these mean - it's up to your application to know what they mean. What are they? It's an <a href="http://docwiki.embarcadero.com/RADStudio/Berlin/en/Simple_Types_(Delphi)#Enumerated_Types" rel="nofollow">enum (or enumerated) type definition</a>. But only the author(s) of this code knows the original intention. Usually, such types are documented somewhere for future developers to understand.</p> <p>If such documentation is unavailable, I suggest doing a global search of your code to find the usage of each, and observe how they're being used in the context of the code around it. I also suggest documenting things, at least as code comments, as you go along. I've even seen big libraries such as Indy raise question in the code's comments. </p>