What word means compliance with general rules, reduction to a general form, etc.?

Question

IT terminology

What is the name of the process when all data, for example, on a website must meet certain predetermined conditions? As an example, let's say that all product cards must be written in capital letters, product categories must begin with a capital letter, and the rest are lowercase, or pictures must all be the same size ... or something else, but where the data must end as a result, be structured according to certain rules ...
Roughly speaking, there is the word structuring, there is the word normalization, there is data formatting, and there is another word that I forgot, but which also means a set of certain rules that are set so that everything in the project obeyed the same logic ...
The word seems to begin either with IN or with NI ... but this is not a fact ....

Answer 1

unification

Answer 2

Style guide, Brand book
I don't even know how to translate.