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

For the first case you propose you can use: '[[:blank:]]+[A-Z0-9]+[[:blank:]]+', for example:

echo "The thing P1 must connect to the J236 thing in the Foo position" | grep -oE '[[:blank:]]+[A-Z0-9]+[[:blank:]]+'

In the second case maybe you need to use something else and not a regex, maybe a script with a dictionary of technical words...

Cheers, Fernando