Yang model deep dive

what is the readability in yang model?
what do you mean by no-stub?
what do you mean by feature -leg?
what do you mean by translator to information models?

Please, provide more context or references to what you are asking about. Your questions are a little too general and vague in order to properly answer.

i was showing the training session regarding the yang model so basically it was just specifying that it provides readability so i just want to understand that part.

Suggest you take a look at RFC 7950 “The YANG 1.1 Data Modeling Language” section 6 “YANG syntax”