Regex to match only uppercase “words” with some exceptions

Question

I have technical strings as the following:

\"The thing P1 must connect to the J236 thing in the Foo position.\"

I would like to match with

Answer 1

Why do you need to do this in one monster-regex? You can use actual code to implement some of these rules, and doing so would be much easier to modify if those requirements change later.

For example:

if(/^[A-Z0-9\s]*$/)
    # sentence is all uppercase, so just fail out
    return 0;

# Carry on with matching uppercase terms