Breakdown of A transparência é o valor de que não abdicamos.
ser
to be
não
not / no
o
him/it (m)
que
who / which / that (relative)
Questions & Answers about A transparência é o valor de que não abdicamos.
Why is it de que instead of just que?
The verb abdicar (to give up / renounce) requires the preposition de. Unlike in English, where you can leave a preposition at the end of a relative clause ("a value we do not give up"), Portuguese strictly requires the preposition to come directly before the relative pronoun que.
Since we are learning about dropping que in formal writing, could we omit it here?
No, you cannot drop it here. The formal omission rule applies only to the conjunction que (meaning "that") when it introduces a subjunctive clause, as in espero compreendam instead of espero que compreendam. In this sentence, que is a relative pronoun (meaning "which"), and relative pronouns can never be omitted in Portuguese.
Why is the verb abdicamos in the indicative rather than the subjunctive?
We use the indicative here because the sentence states a concrete, established fact about a specific subject (A transparência). You would only use the subjunctive in a relative clause if you were referring to an uncertain or non-existent thing, such as saying "I want to find a value that we do not give up" (Quero encontrar um valor de que não abdiquemos).
Is abdicar de the usual way to translate "give up"?