I have a doubt about CamelCase. Supose you have this acronym: Unesco = United Nations Educational, Scientific and Cultural Organization.

You should write:

Problem/Motivation We need to decide on whether to use CamelCase or ALLUPPER for acronyms in Drupal Core class, interface, and namespace names. The standard adopted on this issue earlier (around comment #33) was that they should be ALLUPPER. Various people prefer one alternative or the other (just based on personal preference), and other PHP projects are all over the map on which standard they prefer. So, our options are: