I referred to your cheat sheets for my exam preparation and I think it is wonderful to have such ready-reckoners for a quick reading before the real exam. Thanks for making it available. It really helped me.
I just wanted to state this regarding the optional tag <subscription-durability>Durable / NonDurable</subscription-durability>
If the topic subscription is specified and the durability is not specified, then a default value of NonDurable is assumed (Spec 15.4.9) I feel the "NonDurable" value needs to be highlighted in red. Please let me know what you think.